CVE-2026-59203
Last modified
CVE-2026-59203 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Python | Pillow | >= 12.0.0, < 12.3.0 |
References
- https://github.com/python-pillow/Pillow/pull/9708Issue Tracking, Patch
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-pg7v-jwj7-p798Exploit, Vendor Advisory
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-pg7v-jwj7-p798Exploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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