{"id":"CVE-2026-115557","revision":"10450be55c204b14a318a076893d28ea","records":[{"revision":"10450be55c204b14a318a076893d28ea","observedAt":"2026-10-26T02:35:10.203+00:00","statement":{"source":"cve-program","id":"CVE-2026-115557","aliases":[],"title":"Distrust compromised intermediate certificates in ssl module","description":"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.","state":0,"publishedAt":"2026-10-24T14:15:14.283+00:00","modifiedAt":"2026-10-26T00:37:05.57+00:00","affected":[{"ecosystem":"Vendor product","name":"CPython","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Python Software Foundation\",\n                    \"product\": \"CPython\",\n                    \"repo\": \"https://github.com/python/cpython\",\n                    \"modules\": [\n                        \"ssl\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.11.18\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"version\": \"3.12.0\",\n                            \"lessThan\": \"3.12.16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"version\": \"3.13.0\",\n                            \"lessThan\": \"3.13.18\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"version\": \"3.14.0a1\",\n                            \"lessThan\": \"3.16.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":9.4,"severity":"CRITICAL"}],"references":["http://www.openwall.com/lists/oss-security/2026/10/20/29","https://github.com/python/cpython/pull/160042","https://github.com/python/cpython/issues/160040","https://emudhra.we-have-a-problem.com/","https://mail.python.org/archives/list/security-announce@python.org/thread/FNAJMZV6XQYLVPABNINDMF3VF66AYLW4/","https://github.com/python/cpython/commit/21a50891ab4be2e9955239e625ae2b40c6b1854d","https://github.com/python/cpython/commit/36cd295f32fc9ba19399e01abee91231440a41dd","https://github.com/python/cpython/commit/48d9b2712cd52206c7a5882d0fdca4863ed65e93","https://github.com/python/cpython/commit/7dd8b4736a1419750b94a388e6d158be15836fe6","https://github.com/python/cpython/commit/98f0e4ed349f370dc8a00366da1a9797e11c9ed5","https://github.com/python/cpython/commit/a17d9ef549008133eadf20689b1f4787902efe5b","https://github.com/python/cpython/commit/af52b41afa4330fb38583db553631baa2f122f90","https://github.com/python/cpython/commit/c7fd7edf7e0d122a3973cf676fae21b6aaa650a8","https://github.com/python/cpython/commit/e2a9dd97ef9571c710ac0afaa834c8879aebce78","https://github.com/python/cpython/commit/e4500d8a437ee5b988a5410cb9b59d177aa01370","https://github.com/python/cpython/commit/e4f63e65a93cf44c14274aa987e644b8c003625e","https://github.com/python/cpython/commit/e9bf2cf84eebf838a1edaa1c648c2b36345b99d3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115557","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-115557","identifiers":["CVE-2026-115557"]},"retained":false,"historicalAffected":[]}],"coverage":[]}