CVE-2026-115557

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Source
https://cve.org/CVERecord?id=CVE-2026-115557
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-115557.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-115557
Aliases
Downstream
Published
2026-10-24T14:15:14Z
Modified
2026-10-25T13:19:18Z
Severity
  • 9.4 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
Summary
Distrust compromised intermediate certificates in ssl module
Details

Python has added a denylist for known compromised certificates to the "ssl" module to ensure user safety even without certificate revocation configured. Known compromised certificates will automatically be rejected regardless of the SSLContext policy configuration.

Database specific 
{
    "cna_assigner": "PSF",
    "cwe_ids": [
        "CWE-299"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115557.json"
}
References

Affected packages

Git / github.com/python/cpython

Affected ranges

Type
GIT
Repo
https://github.com/python/cpython
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
22d79d9840a275ed6ed36cd590dc74edc61765fb
Fixed
21a50891ab4be2e9955239e625ae2b40c6b1854d
Fixed
36cd295f32fc9ba19399e01abee91231440a41dd
Fixed
48d9b2712cd52206c7a5882d0fdca4863ed65e93
Fixed
7dd8b4736a1419750b94a388e6d158be15836fe6
Fixed
98f0e4ed349f370dc8a00366da1a9797e11c9ed5
Fixed
a17d9ef549008133eadf20689b1f4787902efe5b
Fixed
af52b41afa4330fb38583db553631baa2f122f90
Fixed
c7fd7edf7e0d122a3973cf676fae21b6aaa650a8
Fixed
e2a9dd97ef9571c710ac0afaa834c8879aebce78
Fixed
e4500d8a437ee5b988a5410cb9b59d177aa01370
Fixed
e4f63e65a93cf44c14274aa987e644b8c003625e
Fixed
e9bf2cf84eebf838a1edaa1c648c2b36345b99d3
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "3.16.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "21a50891ab4be2e9955239e625ae2b40c6b1854d"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "36cd295f32fc9ba19399e01abee91231440a41dd"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "48d9b2712cd52206c7a5882d0fdca4863ed65e93"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "7dd8b4736a1419750b94a388e6d158be15836fe6"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "98f0e4ed349f370dc8a00366da1a9797e11c9ed5"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "a17d9ef549008133eadf20689b1f4787902efe5b"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "af52b41afa4330fb38583db553631baa2f122f90"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "c7fd7edf7e0d122a3973cf676fae21b6aaa650a8"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "e2a9dd97ef9571c710ac0afaa834c8879aebce78"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "e4500d8a437ee5b988a5410cb9b59d177aa01370"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "e4f63e65a93cf44c14274aa987e644b8c003625e"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "e9bf2cf84eebf838a1edaa1c648c2b36345b99d3"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v0.*
v0.9.8
v0.9.9
v1.*
v1.0.1
v1.0.2
v1.1
v1.1.1
v1.2
v1.2b1
v1.2b2
v1.2b3
v1.2b4
v1.3
v1.3b1
v1.4
v1.4b1
v1.4b2
v1.4b3
v1.5
v1.5.1
v1.5.2
v1.5.2a1
v1.5.2a2
v1.5.2b1
v1.5.2b2
v1.5.2c1
v1.5a1
v1.5a2
v1.5a3
v1.5a4
v1.5b1
v1.5b2
v1.6a1
v1.6a2
v2.*
v2.0
v2.0b1
v2.0b2
v2.0c1
v2.1
v2.1a1
v2.1a2
v2.1b1
v2.1b2
v2.1c1
v2.1c2
v2.2a3
v2.3c1
v2.3c2
v2.4
v2.4a1
v2.4a2
v2.4a3
v2.4b1
v2.4b2
v2.4c1
v3.*
v3.0a1
v3.0a2
v3.0a3
v3.0a4
v3.0a5
v3.0b1
v3.0b2
v3.0b3
v3.0rc1
v3.0rc2
v3.0rc3
v3.1
v3.10.0a1
v3.10.0a7
v3.11.0a3
v3.11.0a4
v3.11.0a5
v3.11.0a6
v3.11.0a7
v3.11.0b1
v3.11.0b2
v3.11.0b3
v3.11.0b4
v3.11.0b5
v3.11.0rc1
v3.11.0rc2
v3.11.1
v3.11.10
v3.11.11
v3.11.12
v3.11.13
v3.11.14
v3.11.15
v3.11.16
v3.11.17
v3.11.2
v3.11.3
v3.11.4
v3.11.5
v3.11.6
v3.11.7
v3.11.8
v3.11.9
v3.12.0
v3.12.0a1
v3.12.0a2
v3.12.0a3
v3.12.0a4
v3.12.0a5
v3.12.0a6
v3.12.0a7
v3.12.0b1
v3.12.0b2
v3.12.0b3
v3.12.0b4
v3.12.0rc1
v3.12.0rc2
v3.12.0rc3
v3.12.1
v3.12.10
v3.12.11
v3.12.12
v3.12.13
v3.12.14
v3.12.15
v3.12.2
v3.12.3
v3.12.4
v3.12.5
v3.12.6
v3.12.7
v3.12.8
v3.12.9
v3.13.0
v3.13.0a1
v3.13.0a2
v3.13.0a3
v3.13.0a4
v3.13.0a5
v3.13.0a6
v3.13.0b1
v3.13.0b2
v3.13.0b3
v3.13.0b4
v3.13.0rc1
v3.13.0rc2
v3.13.0rc3
v3.13.1
v3.13.10
v3.13.11
v3.13.12
v3.13.13
v3.13.14
v3.13.15
v3.13.16
v3.13.17
v3.13.2
v3.13.3
v3.13.4
v3.13.5
v3.13.6
v3.13.7
v3.13.8
v3.14.0
v3.14.0a1
v3.14.0a2
v3.14.0a3
v3.14.0a4
v3.14.0a5
v3.14.0a6
v3.14.0a7
v3.14.0b1
v3.14.0b2
v3.14.0b3
v3.14.0b4
v3.14.0rc1
v3.14.0rc2
v3.14.0rc3
v3.14.1
v3.14.2
v3.14.3
v3.14.4
v3.14.5
v3.14.5rc1
v3.14.6
v3.14.7
v3.14.8
v3.14.9
v3.15.0
v3.15.0a1
v3.15.0a2
v3.15.0a3
v3.15.0a4
v3.15.0a5
v3.15.0a6
v3.15.0a7
v3.15.0a8
v3.15.0b1
v3.15.0b2
v3.15.0b3
v3.15.0b4
v3.15.0rc1
v3.15.0rc2
v3.15.0rc3
v3.15.1
v3.1a1
v3.1a2
v3.1b1
v3.1rc1
v3.1rc2
v3.2a1
v3.2a2
v3.2a3
v3.2a4
v3.2b1
v3.2b2
v3.2rc1
v3.2rc2
v3.2rc3
v3.3.0a2
v3.3.0a3
v3.3.0a4
v3.3.0b1
v3.3.0b2
v3.3.0rc1
v3.3.0rc2
v3.3.0rc3
v3.4.0a1
v3.4.0a2
v3.4.0a3
v3.4.0a4
v3.4.0b1
v3.4.0b2
v3.4.0b3
v3.5.0a1
v3.5.0a2
v3.5.0a3
v3.5.0a4
v3.5.0b1
v3.6.0a3
v3.6.0b1
v3.7.0a2
v3.9.0a2

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-115557.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "192217216991091263475711989879938316954",
                "238070989960576811264482105902919823341",
                "134038719095220871405284827112287868518",
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                "15949714626956394121619362262004021854",
                "124051474882245648160737536393568773260",
                "242757717082730188500821256786854773831",
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                "185277528451095632571122012543930156537",
                "248903670722248384815981248722484760574",
                "175989873312767661036254412706751685521",
                "161683403892585145159284253956433083260"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-115557-09b7462a",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/98f0e4ed349f370dc8a00366da1a9797e11c9ed5",
        "target": {
            "file": "Modules/_ssl.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "191705627437200287854997013070490452970",
            "length": 2977
        },
        "id": "CVE-2026-115557-2dd10dec",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/98f0e4ed349f370dc8a00366da1a9797e11c9ed5",
        "target": {
            "file": "Modules/_ssl.c",
            "function": "newPySSLSocket"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "56280158761300933419249271862590179075",
            "length": 3043
        },
        "id": "CVE-2026-115557-311c9994",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/36cd295f32fc9ba19399e01abee91231440a41dd",
        "target": {
            "file": "Modules/_ssl.c",
            "function": "newPySSLSocket"
        }
    },
    {
        "deprecated": false,
        "digest": {
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                "192217216991091263475711989879938316954",
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                "134038719095220871405284827112287868518",
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                "330788130771942814246540460120775367056",
                "15949714626956394121619362262004021854",
                "124051474882245648160737536393568773260",
                "242757717082730188500821256786854773831",
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                "185277528451095632571122012543930156537",
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                "175989873312767661036254412706751685521",
                "161683403892585145159284253956433083260"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-115557-3710abf2",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/36cd295f32fc9ba19399e01abee91231440a41dd",
        "target": {
            "file": "Modules/_ssl.c"
        }
    },
    {
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        "digest": {
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                "134038719095220871405284827112287868518",
                "77970071526235605340954041649680607146",
                "21884609601975357649917134593042529944",
                "136165768508008028945992981145197065028",
                "330788130771942814246540460120775367056",
                "15949714626956394121619362262004021854",
                "124051474882245648160737536393568773260",
                "242757717082730188500821256786854773831",
                "240375076327967952430039559328208001334",
                "185277528451095632571122012543930156537",
                "248903670722248384815981248722484760574",
                "175989873312767661036254412706751685521",
                "161683403892585145159284253956433083260"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-115557-4e7bf75c",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/e9bf2cf84eebf838a1edaa1c648c2b36345b99d3",
        "target": {
            "file": "Modules/_ssl.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "192217216991091263475711989879938316954",
                "238070989960576811264482105902919823341",
                "134038719095220871405284827112287868518",
                "77970071526235605340954041649680607146",
                "124051474882245648160737536393568773260",
                "242757717082730188500821256786854773831",
                "240375076327967952430039559328208001334",
                "249830481294650080298236528663764769673",
                "134949556096744398870646435413078257035",
                "205883224611726291114141986066901257124",
                "236738915866659534465695940249703127974",
                "210887092294672740715694065927839624289",
                "176133449056693427239898443610206236139",
                "288422798758036370032428440816371929460",
                "130456764179447088121999758037892072961",
                "105542129947736799847561309588421451365",
                "120892600845899487173191715550550967353"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-115557-5d0aee23",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/a17d9ef549008133eadf20689b1f4787902efe5b",
        "target": {
            "file": "Modules/_ssl.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "290437881438454414008666605443973194969",
            "length": 441
        },
        "id": "CVE-2026-115557-5ddebfbc",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/7dd8b4736a1419750b94a388e6d158be15836fe6",
        "target": {
            "file": "Modules/_ssl.c",
            "function": "_set_verify_mode"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "151892012625720414648886001279065125950",
            "length": 519
        },
        "id": "CVE-2026-115557-7ebdde20",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/af52b41afa4330fb38583db553631baa2f122f90",
        "target": {
            "file": "Modules/_ssl.c",
            "function": "_set_verify_mode"
        }
    },
    {
        "deprecated": false,
        "digest": {
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                "248903670722248384815981248722484760574",
                "175989873312767661036254412706751685521",
                "161683403892585145159284253956433083260"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-115557-a6e8be42",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/7dd8b4736a1419750b94a388e6d158be15836fe6",
        "target": {
            "file": "Modules/_ssl.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "102565169441161694672235038587348650397",
            "length": 3465
        },
        "id": "CVE-2026-115557-b9c1a03f",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/7dd8b4736a1419750b94a388e6d158be15836fe6",
        "target": {
            "file": "Modules/_ssl.c",
            "function": "newPySSLSocket"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "151892012625720414648886001279065125950",
            "length": 519
        },
        "id": "CVE-2026-115557-bef78288",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/a17d9ef549008133eadf20689b1f4787902efe5b",
        "target": {
            "file": "Modules/_ssl.c",
            "function": "_set_verify_mode"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "290437881438454414008666605443973194969",
            "length": 441
        },
        "id": "CVE-2026-115557-c6398b6b",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/e9bf2cf84eebf838a1edaa1c648c2b36345b99d3",
        "target": {
            "file": "Modules/_ssl.c",
            "function": "_set_verify_mode"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
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                "134038719095220871405284827112287868518",
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        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/af52b41afa4330fb38583db553631baa2f122f90",
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    {
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        "digest": {
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            "length": 441
        },
        "id": "CVE-2026-115557-fcfbb104",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/python/cpython/commit/36cd295f32fc9ba19399e01abee91231440a41dd",
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]
vanir_signatures_modified 
"2026-10-25T13:19:18Z"