{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-116566", "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22", "state": "PUBLISHED", "assignerShortName": "PSF", "dateReserved": "2026-10-26T15:00:04.249Z", "datePublished": "2026-10-29T17:45:47.583Z", "dateUpdated": "2026-10-30T00:31:35.068Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "modules": ["socket"], "product": "CPython", "repo": "https://github.com/python/cpython", "vendor": "Python Software Foundation", "versions": [{"lessThan": "3.16.0", "status": "affected", "version": "0", "versionType": "python"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Venukamatchi (https://github.com/Venukamatchi)"}, {"lang": "en", "type": "coordinator", "value": "Seth Larson (https://github.com/sethmlarson)"}, {"lang": "en", "type": "remediation reviewer", "value": "Gregory P. Smith (https://github.com/gpshead)"}, {"lang": "en", "type": "remediation reviewer", "value": "Stan Ulbrych (https://github.com/StanFromIreland)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"type": "text/html", "value": "socket.getaddrinfo() previously accepted null bytes within *host* and *port* parameters which can cause the values to be silently truncated."}], "value": "socket.getaddrinfo() previously accepted null bytes within *host* and *port* parameters which can cause the values to be silently truncated."}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "ADJACENT", "baseScore": 5.3, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-158", "description": "CWE-158", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "28c92f92-d60d-412d-b760-e73465c3df22", "shortName": "PSF", "dateUpdated": "2026-10-30T00:31:35.068Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/python/cpython/pull/160899"}, {"tags": ["issue-tracking"], "url": "https://github.com/python/cpython/issues/160898"}, {"tags": ["vendor-advisory"], "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/HCHE62VYTPYI6WOPJQDWUBR4CINBPSM7/"}, {"tags": ["patch"], "url": "https://github.com/python/cpython/commit/131a3a66c5f400b588f9fd2732a5ed4e89623ee3"}], "source": {"discovery": "UNKNOWN"}, "title": "socket.getaddrinfo() accepts embedded null bytes in host and port", "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/10/29/4"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-10-29T20:06:19.347Z"}}]}}

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{}