{"id":"CVE-2026-59203","aliases":["BIT-pillow-2026-59203","GHSA-pg7v-jwj7-p798","PYSEC-2026-3452"],"url":"https://o3.security/vulnerability/CVE-2026-59203","summary":"Pillow EpsImagePlugin negative %%BeginBinary byte count causes infinite loop denial of service","details":"Pillow is a Python imaging library. From 12.0.0 through 12.2.0, Pillow's EPS parser in PIL/EpsImagePlugin.py accepts a negative byte count in the %%BeginBinary directive, allowing a crafted EPS file to cause Image.open() to seek backwards to the same directive and parse it repeatedly in an infinite loop. This issue is fixed in version 12.3.0.","published":"2026-07-14T15:43:58.333Z","modified":"2026-08-12T03:51:25.032738783Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":{"score":0.00399,"percentile":0.33107,"asOf":"2026-08-18"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"pillow","fixedVersion":"12.3.0"}],"fix":{"url":"https://github.com/python-pillow/Pillow/commit/03992618118b4a76b6163cd72ab5ecd684133b83","label":"python-pillow/Pillow@0399261"},"references":[{"type":"WEB","url":"https://github.com/python-pillow/Pillow/releases/tag/12.3.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59203.json"},{"type":"ADVISORY","url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-pg7v-jwj7-p798"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59203"},{"type":"FIX","url":"https://github.com/python-pillow/Pillow/commit/03992618118b4a76b6163cd72ab5ecd684133b83"},{"type":"FIX","url":"https://github.com/python-pillow/Pillow/pull/9708"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:25.032738783Z"}}