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

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

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-789 CWE-770

Affected Products

python-pillow

oss-projectaka pillow

PillowLibrary

oss-project·US

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Impact

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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

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