UBUNTU-CVE-2026-61642

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Source
https://ubuntu.com/security/CVE-2026-61642
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61642.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-61642
Upstream
Downstream
Related
Published
2026-10-13T17:17:00Z
Modified
2026-10-22T10:30:09Z
Severity
  • 7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing (src/HttpHeader.cc) accepted the bare Transfer-Encoding: identity form, which the HTTP specification prohibits because any transfer coding must be wrapped within chunked encoding. This problem allows a trusted client to perform an HTTP Request Smuggling attack when HTTP/1.1 is used, bypassing security mechanisms that may be in place between attacker and Squid. When there is an HTTP cache operating prior to the affected Squid, this Request Smuggling attack also allows the attacker to poison that web cache and store arbitrary malicious content at any URL for delivery to other clients' future requests. This issue is fixed in version 7.6.

References

Affected packages

Ubuntu:22.04:LTS
squid

Package

Name
squid
Purl
pkg:deb/ubuntu/squid?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.9-0ubuntu0.22.04.8

Affected versions

4.*
4.13-10ubuntu5
5.*
5.2-1ubuntu1
5.2-1ubuntu3
5.2-1ubuntu4
5.2-1ubuntu4.1
5.2-1ubuntu4.2
5.2-1ubuntu4.3
5.7-0ubuntu0.22.04.1
5.7-0ubuntu0.22.04.2
5.7-0ubuntu0.22.04.3
5.7-0ubuntu0.22.04.4
5.9-0ubuntu0.22.04.1
5.9-0ubuntu0.22.04.2
5.9-0ubuntu0.22.04.3
5.9-0ubuntu0.22.04.4
5.9-0ubuntu0.22.04.5
5.9-0ubuntu0.22.04.7

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "5.9-0ubuntu0.22.04.8"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "5.9-0ubuntu0.22.04.8"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "5.9-0ubuntu0.22.04.8"
        },
        {
            "binary_name": "squid-openssl",
            "binary_version": "5.9-0ubuntu0.22.04.8"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "5.9-0ubuntu0.22.04.8"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "5.9-0ubuntu0.22.04.8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61642.json"
Ubuntu:24.04:LTS
squid

Package

Name
squid
Purl
pkg:deb/ubuntu/squid?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.14-0ubuntu0.24.04.5

Affected versions

6.*
6.1-2ubuntu1
6.1-2ubuntu2
6.5-1ubuntu1
6.5-1ubuntu2
6.5-1ubuntu3
6.6-1ubuntu4
6.6-1ubuntu5
6.6-1ubuntu5.1
6.10-0ubuntu0.24.04.1
6.13-0ubuntu0.24.04.1
6.13-0ubuntu0.24.04.2
6.13-0ubuntu0.24.04.3
6.14-0ubuntu0.24.04.1
6.14-0ubuntu0.24.04.2
6.14-0ubuntu0.24.04.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.24.04.5"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.24.04.5"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.24.04.5"
        },
        {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.24.04.5"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.24.04.5"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.24.04.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61642.json"
Ubuntu:26.04:LTS
squid

Package

Name
squid
Purl
pkg:deb/ubuntu/squid?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.13-1ubuntu4
6.13-1ubuntu5
7.*
7.2-2ubuntu1
7.2-2ubuntu2
7.2-2ubuntu2.2
7.7-0ubuntu0.26.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "7.7-0ubuntu0.26.04.1"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "7.7-0ubuntu0.26.04.1"
        },
        {
            "binary_name": "squid-openssl",
            "binary_version": "7.7-0ubuntu0.26.04.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61642.json"
Ubuntu:Pro:16.04:LTS
squid3

Package

Name
squid3
Purl
pkg:deb/ubuntu/squid3?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.5.12-1ubuntu7.16+esm7

Affected versions

3.*
3.3.8-1ubuntu16
3.3.8-1ubuntu17
3.5.12-1ubuntu6
3.5.12-1ubuntu7
3.5.12-1ubuntu7.1
3.5.12-1ubuntu7.2
3.5.12-1ubuntu7.3
3.5.12-1ubuntu7.4
3.5.12-1ubuntu7.5
3.5.12-1ubuntu7.6
3.5.12-1ubuntu7.7
3.5.12-1ubuntu7.8
3.5.12-1ubuntu7.9
3.5.12-1ubuntu7.10
3.5.12-1ubuntu7.11
3.5.12-1ubuntu7.12
3.5.12-1ubuntu7.13
3.5.12-1ubuntu7.14
3.5.12-1ubuntu7.15
3.5.12-1ubuntu7.16
3.5.12-1ubuntu7.16+esm1
3.5.12-1ubuntu7.16+esm2
3.5.12-1ubuntu7.16+esm3
3.5.12-1ubuntu7.16+esm4
3.5.12-1ubuntu7.16+esm5
3.5.12-1ubuntu7.16+esm6

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "3.5.12-1ubuntu7.16+esm7"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.12-1ubuntu7.16+esm7"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "3.5.12-1ubuntu7.16+esm7"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "3.5.12-1ubuntu7.16+esm7"
        },
        {
            "binary_name": "squid3",
            "binary_version": "3.5.12-1ubuntu7.16+esm7"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "3.5.12-1ubuntu7.16+esm7"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61642.json"
Ubuntu:Pro:18.04:LTS
squid3

Package

Name
squid3
Purl
pkg:deb/ubuntu/squid3?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.5.27-1ubuntu1.14+esm6

Affected versions

3.*
3.5.23-5ubuntu1
3.5.23-5ubuntu2
3.5.27-1ubuntu1
3.5.27-1ubuntu1.1
3.5.27-1ubuntu1.2
3.5.27-1ubuntu1.3
3.5.27-1ubuntu1.4
3.5.27-1ubuntu1.5
3.5.27-1ubuntu1.6
3.5.27-1ubuntu1.7
3.5.27-1ubuntu1.8
3.5.27-1ubuntu1.9
3.5.27-1ubuntu1.10
3.5.27-1ubuntu1.11
3.5.27-1ubuntu1.12
3.5.27-1ubuntu1.13
3.5.27-1ubuntu1.14
3.5.27-1ubuntu1.14+esm1
3.5.27-1ubuntu1.14+esm2
3.5.27-1ubuntu1.14+esm3
3.5.27-1ubuntu1.14+esm4
3.5.27-1ubuntu1.14+esm5

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "3.5.27-1ubuntu1.14+esm6"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.27-1ubuntu1.14+esm6"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "3.5.27-1ubuntu1.14+esm6"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "3.5.27-1ubuntu1.14+esm6"
        },
        {
            "binary_name": "squid3",
            "binary_version": "3.5.27-1ubuntu1.14+esm6"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "3.5.27-1ubuntu1.14+esm6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61642.json"
Ubuntu:Pro:20.04:LTS
squid

Package

Name
squid
Purl
pkg:deb/ubuntu/squid?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.10-1ubuntu1.13+esm3

Affected versions

4.*
4.8-1ubuntu2
4.8-1ubuntu3
4.9-2ubuntu1
4.9-2ubuntu2
4.9-2ubuntu3
4.9-2ubuntu4
4.10-1ubuntu1
4.10-1ubuntu1.1
4.10-1ubuntu1.2
4.10-1ubuntu1.3
4.10-1ubuntu1.4
4.10-1ubuntu1.5
4.10-1ubuntu1.6
4.10-1ubuntu1.7
4.10-1ubuntu1.8
4.10-1ubuntu1.9
4.10-1ubuntu1.10
4.10-1ubuntu1.11
4.10-1ubuntu1.12
4.10-1ubuntu1.13
4.10-1ubuntu1.13+esm1
4.10-1ubuntu1.13+esm2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "4.10-1ubuntu1.13+esm3"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "4.10-1ubuntu1.13+esm3"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "4.10-1ubuntu1.13+esm3"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "4.10-1ubuntu1.13+esm3"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "4.10-1ubuntu1.13+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61642.json"