{"id":"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.","aliases":["BIT-pillow-2026-59203","GHSA-pg7v-jwj7-p798","PYSEC-2026-3452"],"modified":"2026-07-17T03:41:36.069921978Z","published":"2026-07-14T15:43:58.333Z","database_specific":{"cwe_ids":["CWE-835"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59203.json","cna_assigner":"GitHub_M"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python-pillow/pillow","events":[{"introduced":"693df7b42c666f88c719f9973be0ad71607328e0"},{"fixed":"bb1d8e8ab8d29048624d96e3ee53cecf7c13d13d"},{"fixed":"03992618118b4a76b6163cd72ab5ecd684133b83"}],"database_specific":{"cpe":"cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"12.0.0"},{"fixed":"12.3.0"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["12.2.0","12.1.0","12.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59203.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}