High 8.7Published Jul 14, 2026

CVE-2026-59204Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service

Updated under an hour ago (Oct 27, 2026, 10:23 PM ET)

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It affects python-pillow Pillow and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for python-pillow Pillow

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-789
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Jul 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

python-pillow Pillow python_pillow:pillow (from the name)	from 8.2.0, < 12.3.0	CNA record
python pillow python:pillow	from 8.2.0 before 12.3.0	NVD

References

References

https://github.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44j	x-refsource-confirm, exploit, vendor-advisory
https://github.com/python-pillow/Pillow/pull/9704	x-refsource-misc, exploit, issue-tracking, patch
https://github.com/python-pillow/Pillow/commit/13ada41172142f2fd9f0906f615a00ea623a11ca	x-refsource-misc, patch
https://github.com/python-pillow/Pillow/releases/tag/12.3.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.