CVE-2026-11564

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Source
https://cve.org/CVERecord?id=CVE-2026-11564
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-11564.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-11564
Aliases
Downstream
ALPINE (1)
BELL (1)
CGA (20)
DEBIAN (1)
JLSEC (1)
MINI (2)
openSUSE (1)
RHSA (2)
ROOT (1)
UBUNTU (1)
Related
Published
2026-07-03T06:12:35Z
Modified
2026-09-30T08:05:50Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Native CA trust persist
Details

libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup.

An easy handle that first uses default native CA trust can continue trusting the native platform store after the application switches that same handle to custom CA material for a later transfer.

Database specific 
{
    "cna_assigner": "curl",
    "cwe_ids": [
        "CWE-295"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11564.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "8.17.0"
                },
                {
                    "fixed": "8.20.1"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type
GIT
Repo
https://github.com/curl/curl
Events
Introduced
a05f34973e6c4bb629d018f7cb51487be1c904d8
Fixed
68720b4837284335b2d63cb358f8f6ce65f5bc55
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "8.20.0"
        },
        {
            "last_affected": "8.20.0"
        },
        {
            "introduced": "8.19.0"
        },
        {
            "last_affected": "8.19.0"
        },
        {
            "introduced": "8.18.0"
        },
        {
            "last_affected": "8.18.0"
        },
        {
            "introduced": "8.17.0"
        },
        {
            "last_affected": "8.17.0"
        },
        {
            "fixed": "8.21.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
eefd03c572996e5de4dec4fe295ad6f103e0eefc
Fixed
d69bfad3fa3daf5e72331f6870667607828d5891

Affected versions

8.*
8.17.0
8.18.0
8.19.0
8.20.0
Other
curl-8_17_0
curl-8_18_0
curl-8_19_0
curl-8_20_0
rc-8_18_0-1
rc-8_18_0-2
rc-8_18_0-3
rc-8_19_0-1
rc-8_19_0-2
rc-8_19_0-3
rc-8_20_0-1
rc-8_20_0-2
rc-8_20_0-3
rc-8_21_0-1
rc-8_21_0-2
rc-8_21_0-3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-11564.json"
vanir_signatures 
[
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                "124352082369572260332869994101778297790"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-11564-24e02116",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/d69bfad3fa3daf5e72331f6870667607828d5891",
        "target": {
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        }
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            "threshold": 0.9
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        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/d69bfad3fa3daf5e72331f6870667607828d5891",
        "target": {
            "file": "lib/setopt.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "21443433544174325038658804853537595721",
            "length": 4989
        },
        "id": "CVE-2026-11564-6bb6da89",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/d69bfad3fa3daf5e72331f6870667607828d5891",
        "target": {
            "file": "lib/vtls/vtls_config.c",
            "function": "Curl_ssl_easy_config_complete"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "71063295310151775568400902582687714843",
            "length": 4063
        },
        "id": "CVE-2026-11564-6d85ea71",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/d69bfad3fa3daf5e72331f6870667607828d5891",
        "target": {
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            "function": "doh_probe_run"
        }
    },
    {
        "deprecated": false,
        "digest": {
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            "length": 609
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        "id": "CVE-2026-11564-8382c086",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/d69bfad3fa3daf5e72331f6870667607828d5891",
        "target": {
            "file": "lib/setopt.c",
            "function": "set_ssl_options"
        }
    },
    {
        "deprecated": false,
        "digest": {
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            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-11564-e26f3f84",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/d69bfad3fa3daf5e72331f6870667607828d5891",
        "target": {
            "file": "lib/vtls/vtls_config.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "26599435492158053357627362200812826547",
            "length": 1370
        },
        "id": "CVE-2026-11564-fbb5c288",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/d69bfad3fa3daf5e72331f6870667607828d5891",
        "target": {
            "file": "lib/setopt.c",
            "function": "setopt_long_ssl"
        }
    }
]
vanir_signatures_modified 
"2026-09-30T08:05:50Z"