{"action":"Upgrade pillow to 12.3.0 or later.","affected":[{"fixed":"12.3.0","introduced":"0"}],"component":"pillow","cve_ids":["CVE-2026-55380"],"ecosystem":"PyPI","epss":0.00518,"exploited":false,"fixed_versions":["12.3.0"],"ghsa_id":"GHSA-phj9-mv4w-65pm","id":"tcs_01M5KGYCFCFHM40SG1246D2PBH","modified_at":"2026-07-13T07:26:17.085341343Z","published_at":"2026-07-06T19:17:08.703Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2256","https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst","https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675","https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-2256","url":"https://osv.dev/vulnerability/PYSEC-2026-2256"}],"summary":"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._decompress"}