{"id":"CVE-2026-96637","published":"2026-10-21T21:20:31.927","lastModified":"2026-10-23T22:17:01.413","description":"Pillow is a Python imaging library. Prior to 13.0.0, SpiderImageFile.seek() in src/PIL/SpiderImagePlugin.py reparses a later SPIDER stack frame and replaces self._size without rerunning Image._decompression_bomb_check(). A tiny file can use a safe first frame to pass Image.open() and then declare very large dimensions in a later mode F frame. Loading that frame allocates approximately four bytes per attacker-declared pixel and can consume multiple gigabytes of memory. This issue is fixed in version 13.0.0.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-400","CWE-409"],"vendors":[],"products":[],"references":[{"url":"https://github.com/python-pillow/Pillow/commit/7cb0e02389d8aac2a60896a490f572db0b07b841","tags":[]},{"url":"https://github.com/python-pillow/Pillow/pull/10076","tags":[]},{"url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","tags":[]},{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-g842-9rc4-69pw","tags":[]}],"exploitRefs":[{"url":"https://github.com/python-pillow/Pillow/commit/7cb0e02389d8aac2a60896a490f572db0b07b841","tags":[]},{"url":"https://github.com/python-pillow/Pillow/pull/10076","tags":[]},{"url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","tags":[]},{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-g842-9rc4-69pw","tags":[]}],"hasPoc":true,"ai":null}