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CVE-2026-59203

Pillow EpsImagePlugin negative %%BeginBinary byte count causes infinite loop denial of service

Published: Jul 14, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-835
5.3MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 67.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-835

Affected Products

python-pillow
oss-projectaka pillow
PillowLibrary
OSS Libraries / pypi
python
oss-project·US
pillow
OSS Libraries

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

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
and 1 more references View all →

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