PT-2026-58091 · Python Pillow+1 · Pillow

Published 2026-07-14 · Updated 2026-07-14 · CVE-2026-59203

Mitre

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2026-59203

Affected Products

Pillow

References · 5

• https://github.com/python-pillow/Pillow/pull/9708 · Patch
• https://github.com/python-pillow/Pillow/commit/03992618118b4a76b6163cd72ab5ecd684133b83 · Patch
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-pg7v-jwj7-p798 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-59203 · Security Note
• https://github.com/python-pillow/Pillow/releases/tag/12.3.0 · Note