CVE-2026-59203
Pillow EpsImagePlugin negative %%BeginBinary byte count causes infinite loop denial of service
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-835 |
| Vendor | python-pillow |
| Product | pillow |
| Published | Jul 14, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
python-pillow / Pillow
>= 12.0.0, < 12.3.0
References
github.com: https://github.com/python-pillow/Pillow/security/advisories/GHSA-pg7v-jwj7-p798 github.com: https://github.com/python-pillow/Pillow/pull/9708 github.com: https://github.com/python-pillow/Pillow/commit/03992618118b4a76b6163cd72ab5ecd684133b83 github.com: https://github.com/python-pillow/Pillow/releases/tag/12.3.0