{"id":"CVE-2026-87910","title":"When tarfile extracts a link on a system that doesn't support links, it falls back to extracting a member from the archive","summary":"When tarfile extracts a link on a system that doesn't support links, it falls back to extracting a member from the archive. In this case, the filter function is run twice: once for the extracted member, and once with name set to the loca…","severity":"medium","cvss":5.7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-22","CWE-59","CWE-252"],"vendor":"Python Software Foundation","product":"CPython","affected":["CPython < 3.15.0"],"patched":["hardened_images"],"published":"2026-09-11","updated":"2026-09-22","sourceUpdated":"2026-09-22T01:16:55.053","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87910","references":[{"url":"https://github.com/python/cpython/commit/9c17bace90f88dfba6d0e2fe23c8e7ae35f83955","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/d9565e54b1fc6d63c5be9afd58114499128fa57b","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/fb2f0bbc3b35264f09cc2cb2934b7987527a6bc2","label":"cna@python.org"},{"url":"https://github.com/python/cpython/issues/157265","label":"cna@python.org"},{"url":"https://github.com/python/cpython/pull/157266","label":"cna@python.org"},{"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/57TBTLL2W6APMZR3A25B2YV7GL3EPTDJ/","label":"cna@python.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/11/8","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87910.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-87910"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531985"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87910"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87910"},{"url":"https://access.redhat.com/errata/RHSA-2026:67572"},{"url":"https://access.redhat.com/errata/RHSA-2026:67574"},{"url":"https://access.redhat.com/errata/RHSA-2026:67575"},{"url":"https://access.redhat.com/errata/RHSA-2026:67607"},{"url":"https://access.redhat.com/errata/RHSA-2026:67606"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-11T19:23:39.973519Z"},"cvssSource":"cna","epss":0.00433,"epssPercentile":0.37114,"ingestedAt":"2026-09-14T15:23:07.484Z","slug":"CVE-2026-87910","body":"## Overview\n\nWhen tarfile extracts a link on a system that doesn't support links, it falls back to extracting a member from the archive. In this case, the filter function is run twice: once for the extracted member, and once with name set to the location of the link. For one of the calls, the return value was ignored. Instead, the member should be skipped if either call returns None.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87910.json)\n- **RHSA-2026:67572** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67572)\n- **RHSA-2026:67574** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67574)\n- **RHSA-2026:67575** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67575)\n- **RHSA-2026:67607** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67607)\n- **RHSA-2026:67606** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67606)","depth":"sunlit","depthScore":31,"depthScoreParts":{"impact":31.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}