{"id":"CVE-2026-96636","published":"2026-10-21T21:20:31.760","lastModified":"2026-10-22T16:46:48.920","description":"Pillow is a Python imaging library. Prior to 13.0.0, MpoImageFile.seek() and DcxImageFile.seek() reparse later MPO or DCX frames and replace self._size without rerunning Image._decompression_bomb_check(). A crafted multi-frame image can use a tiny first frame to pass Image.open() and then declare an over-limit later frame. Normal frame iteration through seek(), load(), or ImageSequence.Iterator can decode that frame and commit hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwes":["CWE-400","CWE-409"],"vendors":[],"products":[],"references":[{"url":"https://github.com/python-pillow/Pillow/commit/f1acfc54c53502948d0d14121872061df931db48","tags":[]},{"url":"https://github.com/python-pillow/Pillow/pull/10011","tags":[]},{"url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","tags":[]},{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-p8hx-v2p6-rp84","tags":[]}],"exploitRefs":[{"url":"https://github.com/python-pillow/Pillow/commit/f1acfc54c53502948d0d14121872061df931db48","tags":[]},{"url":"https://github.com/python-pillow/Pillow/pull/10011","tags":[]},{"url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","tags":[]},{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-p8hx-v2p6-rp84","tags":[]}],"hasPoc":true,"ai":null}