{"id":"CVE-2026-112399","published":"2026-10-19T22:17:07.240","lastModified":"2026-10-19T22:17:07.240","description":"Pillow is a Python imaging library. From 8.1.0 until 13.0.0, Pillow can allocate an APNG disposal background at the full canvas size before applying the decompression-bomb check. A crafted APNG with a small first frame, a very large declared canvas, and background disposal or first-frame OP_PREVIOUS reaches PngImageFile._seek while Image.open() positions frame zero. The full-canvas allocation occurs inside Image.open() without requiring pixel loading or frame iteration. This can exhaust memory and deny service. This issue is fixed in version 13.0.0.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-789"],"vendors":[],"products":[],"references":[{"url":"https://github.com/python-pillow/Pillow/commit/f1acfc54c53502948d0d14121872061df931db48","tags":[]},{"url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","tags":[]},{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xm2-6676-qcp9","tags":[]}],"exploitRefs":[{"url":"https://github.com/python-pillow/Pillow/commit/f1acfc54c53502948d0d14121872061df931db48","tags":[]},{"url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","tags":[]},{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xm2-6676-qcp9","tags":[]}],"hasPoc":true,"ai":null}