CVE-2026-115557

{"id": "CVE-2026-115557", "cveTags": [], "metrics": {"cvssMetricV40": [{"type": "Secondary", "source": "cna@python.org", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.4, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "cna@python.org", "affectedData": [{"repo": "https://github.com/python/cpython", "vendor": "Python Software Foundation", "modules": ["ssl"], "product": "CPython", "versions": [{"status": "affected", "version": "0", "lessThan": "3.11.18", "versionType": "python"}, {"status": "affected", "version": "3.12.0", "lessThan": "3.12.16", "versionType": "python"}, {"status": "affected", "version": "3.13.0", "lessThan": "3.13.18", "versionType": "python"}, {"status": "affected", "version": "3.14.0", "lessThan": "3.14.10", "versionType": "python"}, {"status": "affected", "version": "3.15.0", "lessThan": "3.15.2", "versionType": "python"}, {"status": "affected", "version": "3.16.0a1", "lessThan": "3.16.0", "versionType": "python"}], "defaultStatus": "unaffected"}]}], "published": "2026-10-24T15:17:33.600", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/10/20/29", "source": "cna@python.org"}, {"url": "https://emudhra.we-have-a-problem.com/", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/21a50891ab4be2e9955239e625ae2b40c6b1854d", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/36cd295f32fc9ba19399e01abee91231440a41dd", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/48d9b2712cd52206c7a5882d0fdca4863ed65e93", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/7dd8b4736a1419750b94a388e6d158be15836fe6", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/98f0e4ed349f370dc8a00366da1a9797e11c9ed5", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/a17d9ef549008133eadf20689b1f4787902efe5b", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/af52b41afa4330fb38583db553631baa2f122f90", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/c7fd7edf7e0d122a3973cf676fae21b6aaa650a8", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/e2a9dd97ef9571c710ac0afaa834c8879aebce78", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/e4500d8a437ee5b988a5410cb9b59d177aa01370", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/e4f63e65a93cf44c14274aa987e644b8c003625e", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/e9bf2cf84eebf838a1edaa1c648c2b36345b99d3", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/issues/160040", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/pull/160042", "source": "cna@python.org"}, {"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/FNAJMZV6XQYLVPABNINDMF3VF66AYLW4/", "source": "cna@python.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/10/24/5", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "cna@python.org", "description": [{"lang": "en", "value": "CWE-299"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-10-27T01:19:05.560", "sourceIdentifier": "cna@python.org"}