CVE-2021-40346

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Source
https://cve.org/CVERecord?id=CVE-2021-40346
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-40346.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-40346
Aliases
Downstream
Related
Published
2021-09-08T17:15:12Z
Modified
2026-07-11T18:15:12Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.25"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "fixed": "2.2.17"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.3.0"
                },
                {
                    "fixed": "2.3.14"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "fixed": "2.4.4"
                }
            ],
            "source": "CPE_RANGE",
            "vendor_product": "haproxy:haproxy"
        },
        {
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "11.0"
                },
                {
                    "last_affected": "11.0"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "debian:debian_linux"
        },
        {
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "33"
                },
                {
                    "last_affected": "33"
                },
                {
                    "introduced": "34"
                },
                {
                    "last_affected": "34"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "fedoraproject:fedora"
        },
        {
            "cpes": [
                "cpe:2.3:a:haproxy:haproxy:2.5:dev0:*:*:*:*:*:*",
                "cpe:2.3:a:haproxy:haproxy:2.5:dev1:*:*:*:*:*:*",
                "cpe:2.3:a:haproxy:haproxy:2.5:dev2:*:*:*:*:*:*",
                "cpe:2.3:a:haproxy:haproxy:2.5:dev3:*:*:*:*:*:*",
                "cpe:2.3:a:haproxy:haproxy:2.5:dev4:*:*:*:*:*:*",
                "cpe:2.3:a:haproxy:haproxy:2.5:dev5:*:*:*:*:*:*",
                "cpe:2.3:a:haproxy:haproxy:2.5:dev6:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev0"
                },
                {
                    "last_affected": "2.5-dev0"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
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                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
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                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev1"
                },
                {
                    "last_affected": "2.5-dev1"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev2"
                },
                {
                    "last_affected": "2.5-dev2"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev3"
                },
                {
                    "last_affected": "2.5-dev3"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev4"
                },
                {
                    "last_affected": "2.5-dev4"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev5"
                },
                {
                    "last_affected": "2.5-dev5"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                },
                {
                    "introduced": "2.5-dev6"
                },
                {
                    "last_affected": "2.5-dev6"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "haproxy:haproxy"
        },
        {
            "extracted_events": [
                {
                    "introduced": "2.0"
                },
                {
                    "fixed": "2.5"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}
References

Affected packages

Git / github.com/haproxy/haproxy

Affected ranges

Type
GIT
Repo
https://github.com/haproxy/haproxy
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3b69886f7dcc3cfb3d166309018e6cfec9ce2c95
Database specific
Show details 
{
    "source": "REFERENCES"
}

Affected versions

v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.1.1
v1.1.10
v1.1.11
v1.1.12
v1.1.13
v1.1.14
v1.1.15
v1.1.16
v1.1.17
v1.1.18
v1.1.19
v1.1.2
v1.1.20
v1.1.21
v1.1.22
v1.1.23
v1.1.24
v1.1.25
v1.1.26
v1.1.27
v1.1.3
v1.1.4
v1.1.5
v1.1.6
v1.1.7
v1.1.8
v1.1.9
v1.2.0
v1.2.1
v1.2.1-pre1
v1.2.1-pre2
v1.2.1-pre3
v1.2.10
v1.2.10.1
v1.2.11
v1.2.11.1
v1.2.12
v1.2.13
v1.2.13.1
v1.2.14
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.2.5-pre1
v1.2.5-pre2
v1.2.5-pre3
v1.2.5-pre4
v1.2.5.1
v1.2.5.2
v1.2.6
v1.2.6-pre4
v1.2.6-pre5
v1.2.7
v1.2.7.1
v1.2.7rc
v1.2.8
v1.2.9
v1.3.0
v1.3.1
v1.3.10
v1.3.10.1
v1.3.10.2
v1.3.11
v1.3.11.1
v1.3.11.2
v1.3.11.3
v1.3.11.4
v1.3.12
v1.3.13
v1.3.14
v1.3.15
v1.3.16
v1.3.16-rc1
v1.3.16-rc2
v1.3.17
v1.3.18
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.3.6.1
v1.3.7
v1.3.8
v1.3.8.1
v1.3.8.2
v1.3.9
v1.4-dev0
v1.4-dev1
v1.4-dev2
v1.4-dev3
v1.4-dev4
v1.4-dev5
v1.4-dev6
v1.4-dev7
v1.4-dev8
v1.4-rc1
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.5-dev10
v1.5-dev12
v1.5-dev13
v1.5-dev14
v1.5-dev15
v1.5-dev16
v1.5-dev17
v1.5-dev18
v1.5-dev19
v1.5-dev20
v1.5-dev21
v1.5-dev22
v1.5-dev23
v1.5-dev24
v1.5-dev25
v1.5-dev26
v1.5-dev8
v1.5-dev9
v1.5.0
v1.6-dev0
v1.6-dev1
v1.6-dev2
v1.6-dev3
v1.6-dev4
v1.6-dev5
v1.6-dev6
v1.6-dev7
v1.6.0
v1.7-dev0
v1.7-dev1
v1.7-dev2
v1.7-dev3
v1.7-dev4
v1.7-dev5
v1.7-dev6
v1.7.0
v1.8-dev0
v1.8-dev1
v1.8-dev2
v1.8-dev3
v1.8-rc1
v1.8-rc2
v1.8-rc3
v1.8-rc4
v1.8.0
v1.9-dev0
v1.9-dev1
v1.9-dev10
v1.9-dev11
v1.9-dev2
v1.9-dev3
v1.9-dev4
v1.9-dev5
v1.9-dev6
v1.9-dev7
v1.9-dev8
v1.9-dev9
v1.9.0
v2.*
v2.0-dev0
v2.0-dev1
v2.0-dev2
v2.0-dev3
v2.0-dev4
v2.0-dev5
v2.0-dev6
v2.0-dev7
v2.0.0
v2.1-dev0
v2.1-dev1
v2.1-dev2
v2.1-dev3
v2.1-dev4
v2.1-dev5
v2.1.0
v2.2-dev0
v2.2-dev1
v2.2-dev10
v2.2-dev11
v2.2-dev12
v2.2-dev2
v2.2-dev3
v2.2-dev4
v2.2-dev5
v2.2-dev6
v2.2-dev7
v2.2-dev8
v2.2-dev9
v2.2.0
v2.3-dev0
v2.3-dev1
v2.3-dev2
v2.3-dev3
v2.3-dev4
v2.3-dev5
v2.3-dev6
v2.3-dev7
v2.3-dev8
v2.3-dev9
v2.3.0
v2.4-dev0
v2.4-dev1
v2.4-dev10
v2.4-dev11
v2.4-dev12
v2.4-dev13
v2.4-dev14
v2.4-dev15
v2.4-dev16
v2.4-dev17
v2.4-dev18
v2.4-dev19
v2.4-dev2
v2.4-dev3
v2.4-dev4
v2.4-dev5
v2.4-dev6
v2.4-dev7
v2.4-dev8
v2.4-dev9
v2.4.0
v2.5-dev0
v2.5-dev1
v2.5-dev2
v2.5-dev3
v2.5-dev4
v2.5-dev5
v2.5-dev6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-40346.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "250362322674641590349589051495230156653",
            "length": 397
        },
        "id": "CVE-2021-40346-720f56ce",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95",
        "target": {
            "file": "include/haproxy/htx.h",
            "function": "htx_add_trailer"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "137971134793007557031146476273999624430",
            "length": 397
        },
        "id": "CVE-2021-40346-a2320c5c",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95",
        "target": {
            "file": "include/haproxy/htx.h",
            "function": "htx_add_header"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "103378957073333009210878063361820249918",
                "90642999860060403562236023336123966002",
                "87325895267160897988184542515128014985",
                "258426726845170808120248969356574058873",
                "156690178870054102966697089710863666198",
                "97589094008776621651354770360189691565"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2021-40346-ff6b9c62",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95",
        "target": {
            "file": "include/haproxy/htx.h"
        }
    }
]
vanir_signatures_modified 
"2026-07-11T18:15:12Z"