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Vulnerability record · CVE-2026-59203 · published 14 July 2026

CVE-2026-59203: Python pillow vulnerability

Python · Pillow

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.

7.5 CVSS 3.1 High EPSS 0.66% · top 50.7% CWE-835 · CWE-835
7.5CVSS 3.1 base score
0.66%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 2 tagged exploit
15 Jul 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/python-pillow/Pillow/commit/03992618118b4a76b6163cd72ab5ecd684133b83 Patch
https://github.com/python-pillow/Pillow/pull/9708 Issue TrackingPatch
https://github.com/python-pillow/Pillow/releases/tag/12.3.0 Release Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-pg7v-jwj7-p798 ExploitVendor Advisory
https://github.com/python-pillow/Pillow/security/advisories/GHSA-pg7v-jwj7-p798 ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-59203), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.