Allocation of Resources Without Limits or Throttling in Pillow - CVE-2026-59204

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Main Vulnerability Database Vulnerabilities #VU137007

Allocation of Resources Without Limits or Throttling in Pillow - CVE-2026-59204

Published: July 7, 2026


Vulnerability identifier: #VU137007
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59204
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper memory allocation in the JPEG2000 tiled decoder in src/libImaging/Jpeg2KDecode.c when parsing a crafted tiled JPEG2000 image during decoding. A remote attacker can supply a specially crafted tiled JPEG2000 file to cause a denial of service.

The issue occurs because total_component_width is accumulated across tiles and then used to calculate tile_bytes, which can grow the scratch buffer to roughly the decompressed size of the full image.


Affected software

Pillow
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Python 3 Module
SUSE Package Hub 15
openSUSE Leap
openEuler
Anolis OS
python-Pillow-debuginfo
python3-Pillow-tk-debuginfo
python-Pillow-debugsource
python3-Pillow
python3-Pillow-tk
python3-Pillow-debuginfo
python-pillow-debugsource
python-pillow
python-pillow-debuginfo
python3-pillow-help
python3-pillow-tk
python3-pillow-qt
python3-pillow-devel
python3-pillow
python311-Pillow-tk-debuginfo
python311-Pillow
python311-Pillow-debuginfo
python311-Pillow-tk
python3-pillow-doc

How to mitigate CVE-2026-59204

Install security update from vendor's website.

Pillow - update to 12.3.0
python-Pillow-debuginfo - addressed in versions 7.2.0-150300.3.30.1, 9.5.0-150400.5.25.1
python3-Pillow-tk-debuginfo - update to 7.2.0-150300.3.30.1
python-Pillow-debugsource - addressed in versions 7.2.0-150300.3.30.1, 9.5.0-150400.5.25.1
python3-Pillow - update to 7.2.0-150300.3.30.1
python3-Pillow-tk - update to 7.2.0-150300.3.30.1
python3-Pillow-debuginfo - update to 7.2.0-150300.3.30.1
python-pillow-debugsource - addressed in versions 9.0.1-12, 10.3.0-8
python-pillow - addressed in versions 9.0.1-12, 10.3.0-8
python-pillow-debuginfo - addressed in versions 9.0.1-12, 10.3.0-8
python3-pillow-help - addressed in versions 9.0.1-12, 10.3.0-8
python3-pillow-tk - addressed in versions 9.0.1-12, 10.3.0-8
python3-pillow-qt - addressed in versions 9.0.1-12, 10.3.0-8
python3-pillow-devel - addressed in versions 9.0.1-12, 10.3.0-8
python3-pillow - addressed in versions 9.0.1-12, 10.3.0-8
python311-Pillow-tk-debuginfo - update to 9.5.0-150400.5.25.1
python311-Pillow - update to 9.5.0-150400.5.25.1
python311-Pillow-debuginfo - update to 9.5.0-150400.5.25.1
python311-Pillow-tk - update to 9.5.0-150400.5.25.1
python3-pillow-devel - update to 12.3.0-1
python3-pillow-qt - update to 12.3.0-1
python3-pillow-tk - update to 12.3.0-1
python3-pillow-doc - update to 12.3.0-1
python3-pillow - update to 12.3.0-1

External References

Related Security Bulletins