Ghostwire

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

HIGH CVSS 0.0 EPSS 0.40% Exploit Available

Published: July 20, 2026 | Last Modified: July 20, 2026

Description

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

Ghostwire Analysis — What This Means Practically

Exploitation Probability (EPSS): Low — 0.40% (32th percentile)

Low exploitation probability based on current threat landscape data. Standard patching timeline is appropriate.

Exploit code is reported to be available, increasing the likelihood of active exploitation.

This analysis is generated by Ghostwire from NVD, CISA KEV, EPSS, and open-source intelligence data. Verify findings through primary sources before acting.

References

github.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44j
nvd.nist.gov/vuln/detail/CVE-2026-59204
github.com/python-pillow/Pillow/pull/9704
github.com/python-pillow/Pillow/commit/13ada41172142f2fd9f0906f615a00ea623a11ca
github.com/python-pillow/Pillow/releases/tag/12.3.0
github.com/advisories/GHSA-vjc4-5qp5-m44j
www.tenable.com/cve/CVE-2026-59204
www.cnnvd.org.cn/home/globalSearch?keyword=CVE-2026-59204