{"schema_version":"1.9.0","id":"BIT-pillow-2026-55380","published":"2026-07-08T11:34:12.441Z","modified":"2026-09-08T08:48:18.491644241Z","aliases":["CVE-2026-55380","GHSA-phj9-mv4w-65pm","PYSEC-2026-2256"],"summary":"Pillow GdImageFile decompression bomb protection bypass","details":"Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open() read image dimensions from the GD 2.x header and stored them in self._size without calling Image._decompression_bomb_check(), allowing a crafted .gd file to trigger excessive C-heap allocation when loaded. This issue is fixed in version 12.3.0.","affected":[{"package":{"name":"pillow","ecosystem":"Bitnami","purl":"pkg:bitnami/pillow"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"12.3.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/pillow/BIT-pillow-2026-55380.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"references":[{"type":"ARTICLE","url":"https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst"},{"type":"FIX","url":"https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675"},{"type":"ADVISORY","url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55380"}],"database_specific":{"cpes":["cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*"],"severity":"High"}}