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CVE-2026-59204

Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service

Published: Jul 14, 2026Updated: Jul 21, 2026 Sources: CVE List NVDCWE-789
7.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 67.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Pillow is a Python imaging library. From 8.2.0 through 12.2.0, src/libImaging/Jpeg2KDecode.c accumulates total_component_width across every tile in a JPEG2000 image instead of recomputing it per tile, allowing a crafted tiled JPEG2000 file to force substantially higher transient memory usage and trigger out-of-memory failures during decoding. 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:H
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:HAvailability
High
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Weaknesses

CWE-789CWE-770

Affected Products

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

Exploitability

Official Patch Available
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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-vjc4-5qp5-m44j
github.com
https://github.com/python-pillow/Pillow/pull/9704
github.com
https://github.com/python-pillow/Pillow/commit/13ada41172142f2fd9f0906f615a00ea623a11ca
github.com
and 1 more references View all →

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