{"schema_version":"1.9.0","id":"CVE-2025-8291","published":"2025-10-07T18:10:05.908Z","modified":"2026-08-12T03:51:41.475648151Z","aliases":["BIT-libpython-2025-8291","BIT-python-2025-8291","BIT-python-min-2025-8291","GHSA-hhv7-p4pg-wm6p","PSF-2025-12"],"related":["ALSA-2025:23323","ALSA-2025:23342","ALSA-2025:23530","ALSA-2025:23940","ALSA-2026:0123","CGA-38xq-jhr9-7p8p","SUSE-SU-2025:21199-1","SUSE-SU-2025:21207-1","SUSE-SU-2025:4221-1","SUSE-SU-2025:4257-1","SUSE-SU-2025:4257-2","SUSE-SU-2025:4258-1","SUSE-SU-2025:4277-1","SUSE-SU-2025:4297-1","SUSE-SU-2025:4313-1","SUSE-SU-2025:4352-1","SUSE-SU-2025:4368-1","SUSE-SU-2025:4389-1","SUSE-SU-2025:4398-1","SUSE-SU-2025:4487-1","SUSE-SU-2026:0133-1","SUSE-SU-2026:20125-1","SUSE-SU-2026:20154-1","openSUSE-SU-2025:15713-1","openSUSE-SU-2025:15742-1","openSUSE-SU-2025:15748-1","openSUSE-SU-2025:15750-1","openSUSE-SU-2025:15760-1","openSUSE-SU-2025:15768-1","openSUSE-SU-2025:15792-1","openSUSE-SU-2026:20081-1"],"summary":"ZIP64 End of Central Directory (EOCD) Locator record offset not checked","details":"The 'zipfile' module would not check the validity of the ZIP64 End of\nCentral Directory (EOCD) Locator record offset value would not be used to\nlocate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be\nassumed to be the previous record in the ZIP archive. This could be abused\nto create ZIP archives that are handled differently by the 'zipfile' module\ncompared to other ZIP implementations.\n\n\nRemediation maintains this behavior, but checks that the offset specified\nin the ZIP64 EOCD Locator record matches the expected value.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python/cpython","events":[{"introduced":"0"},{"introduced":"b494f5935c92951e75597bfe1c8b1f3112fec270"},{"introduced":"deaf509e8fc6e0363bd6f26d52ad42f976ec42f2"},{"introduced":"0fb18b02c8ad56299d6a2910be0bab8ad601ef24"},{"introduced":"60403a5409ff2c3f3b07dd2ca91a7a3e096839c7"},{"introduced":"ebf955df7a89ed0c7968f79faec1de49f61ed7cb"},{"fixed":"91bdb00dfed8634de52e2f64cba7545deb20f74c"},{"fixed":"f08d3c437bc5f41973ddd11f4cfc3d9fe04010f7"},{"fixed":"cd1c3a6342869b7346c1b5c27b8de9c6ef9c4e69"},{"fixed":"4a5632fbf9bf59477c540e3f53fa7cdbeea3e3f5"},{"fixed":"4fd884356d7f29b2a07a4274bef04998ac96d529"},{"fixed":"57e0d177c26d4a508ef46adae9cbae46fca39f70"},{"fixed":"162997bb70e067668c039700141770687bc8f267"},{"fixed":"1d29afb0d6218aa8fb5e1e4a6133a4778d89bb46"},{"fixed":"333d4a6f4967d3ace91492a39ededbcf3faa76a6"},{"fixed":"76437ac248ad8ca44e9bf697b02b1e2241df2196"},{"fixed":"8392b2f0d35678407d9ce7d95655a5b77de161b4"},{"fixed":"bca11ae7d575d87ed93f5dd6a313be6246e3e388"},{"fixed":"d11e69d6203080e3ec450446bfed0516727b85c3"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.9.24"},{"introduced":"3.10.0"},{"fixed":"3.10.19"},{"introduced":"3.11.0"},{"fixed":"3.11.14"},{"introduced":"3.12.0"},{"fixed":"3.12.12"},{"introduced":"3.13.0"},{"fixed":"3.13.10"},{"introduced":"3.14.0"},{"fixed":"3.14.1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v3.13.8","v3.14.0","v3.13.7","v3.13.6","v3.13.5","v3.13.4","v3.11.13","v3.9.23","v3.10.18","v3.12.11","v3.14.0b1","v3.9.22","v3.13.3","v3.11.12","v3.12.10","v3.14.0a7","v3.10.17","v3.14.0a6","v3.14.0a5","v3.13.2","v3.12.9","v3.14.0a4","v3.14.0a3","v3.13.1","v3.12.8","v3.10.16","v3.11.11","v3.9.21","v3.14.0a2","v3.14.0a1","v3.13.0","v3.12.7","v3.11.10","v3.10.15","v3.12.6","v3.9.20","v3.12.5","v3.12.4","v3.13.0b1","v3.13.0a6","v3.12.3","v3.11.9","v3.10.14","v3.9.19","v3.13.0a5","v3.13.0a4","v3.12.2","v3.11.8","v3.13.0a3","v3.12.1","v3.11.7","v3.13.0a2","v3.13.0a1","v3.11.6","v3.12.0","v3.11.5","v3.9.18","v3.10.13","v3.11.4","v3.10.12","v3.9.17","v3.12.0b1","v3.10.11","v3.11.3","v3.12.0a7","v3.12.0a6","v3.10.10","v3.11.2","v3.12.0a5","v3.12.0a4","v3.12.0a3","v3.10.9","v3.11.1","v3.9.16","v3.12.0a2","v3.12.0a1","v3.11.0rc2","v3.10.8","v3.9.15","v3.9.14","v3.10.7","v3.11.0rc1","v3.10.6","v3.11.0b5","v3.11.0b4","v3.10.5","v3.11.0b3","v3.11.0b2","v3.9.13","v3.11.0b1","v3.11.0a7","v3.10.4","v3.9.12","v3.9.11","v3.10.3","v3.11.0a6","v3.11.0a5","v3.11.0a4","v3.10.2","v3.11.0a3","v3.10.1","v3.9.9","v3.9.8","v3.10.0rc2","v3.9.7","v3.10.0rc1","v3.10.0b4","v3.9.6","v3.10.0b3","v3.10.0b2","v3.10.0b1","v3.9.5","v3.10.0a7","v3.9.2","v3.9.2rc1","v3.10.0a1","v3.9.0b5","v3.9.0b3","v3.9.0b1","v3.9.0a2","v3.7.0a2","v3.6.0b1","v3.6.0a3","v3.5.0b1","v3.5.0a4","v3.5.0a3","v3.5.0a2","v3.5.0a1","v3.4.0b3","v3.4.0b2","v3.4.0b1","v3.4.0a4","v3.4.0a3","v3.4.0a2","v3.4.0a1","v3.3.0rc3","v3.3.0rc2","v3.3.0rc1","v3.3.0b2","v3.3.0b1","v3.3.0a4","v3.3.0a3","v3.3.0a2","v3.2rc3","v3.2rc2","v3.2rc1","v3.2b2","v3.2b1","v3.2a4","v3.2a3","v3.2a2","v3.2a1","v3.1","v3.1rc2","v3.1rc1","v3.1b1","v3.1a2","v3.1a1","v3.0rc3","v3.0rc2","v3.0rc1","v3.0b3","v3.0b2","v3.0b1","v3.0a5","v3.0a4","v3.0a3","v3.0a2","v3.0a1","v2.4","v2.4c1","v2.4b2","v2.4b1","v2.4a3","v2.4a2","v2.4a1","v2.3c2","v2.3c1","v2.2a3","v2.1","v2.1c2","v2.1c1","v2.1b2","v2.1b1","v2.1a2","v2.1a1","v2.0","v2.0c1","v2.0b2","v2.0b1","v1.6a2","v1.6a1","v1.5.2","v1.5.2c1","v1.5.2b2","v1.5.2b1","v1.5.2a2","v1.5.2a1","v1.5.1","v1.5","v1.5b2","v1.5b1","v1.5a4","v1.5a3","v1.5a2","v1.5a1","v1.4","v1.4b3","v1.4b2","v1.4b1","v1.3","v1.3b1","v1.2","v1.2b4","v1.2b3","v1.2b2","v1.2b1","v1.1.1","v1.1","v1.0.2","v1.0.1","v0.9.9","v0.9.8"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-8291.json"}}],"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8291.json"},{"type":"ADVISORY","url":"https://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2025-12.json"},{"type":"ADVISORY","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/QECOPWMTH4VPPJAXAH2BGTA4XADOP62G/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-8291"},{"type":"REPORT","url":"https://github.com/python/cpython/issues/139700"},{"type":"FIX","url":"https://github.com/python/cpython/commit/162997bb70e067668c039700141770687bc8f267"},{"type":"FIX","url":"https://github.com/python/cpython/commit/1d29afb0d6218aa8fb5e1e4a6133a4778d89bb46"},{"type":"FIX","url":"https://github.com/python/cpython/commit/333d4a6f4967d3ace91492a39ededbcf3faa76a6"},{"type":"FIX","url":"https://github.com/python/cpython/commit/76437ac248ad8ca44e9bf697b02b1e2241df2196"},{"type":"FIX","url":"https://github.com/python/cpython/commit/8392b2f0d35678407d9ce7d95655a5b77de161b4"},{"type":"FIX","url":"https://github.com/python/cpython/commit/bca11ae7d575d87ed93f5dd6a313be6246e3e38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