CVE-2026-59198 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-59198HIGH

python-pillow Pillow — Pillow TGA RLE encoder can serialize up to ~57 KB of adjacent heap data into generated images

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  N  N    7.5   .0031   24.1     —

AFFECTED
  Product  Versions              Fixed
  Pillow   >= 5.2.0, < 12.3.0 –  —

TIMELINE
  Jul 2   Reserved by GitHub_M
  Jul 14  EXPLOIT PUBLISHED — CVE-2026-59198 (python-pillow Pillow). Public exploit reference added.
  Jul 14  Published (CNA: GitHub_M)

CWE-125 · CNA: GitHub_M · CVSS v3.1 · 4 references · NVD status: Analyzed

Description

Pillow is a Python imaging library. From 5.2.0 until 12.3.0, Pillow's TGA RLE encoder reads past its packed row buffer when saving a mode 1 image with TGA RLE compression, allowing adjacent process heap bytes to be copied into the generated TGA file. This issue is fixed in version 12.3.0.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 2, 2026	Reserved	Reserved by GitHub_M
July 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-59198 (python-pillow Pillow). Public exploit reference added.
July 14, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
python-pillow	Pillow	—	>= 5.2.0, < 12.3.0	—

Weaknesses

CWE-125

References (4)

https://github.com/python-pillow/Pillow/commit/eada3cbd7fb9963ee90673fb7b5270124a0d5f4b [Patch]
https://github.com/python-pillow/Pillow/pull/9709 [Issue Tracking, Patch]
https://github.com/python-pillow/Pillow/releases/tag/12.3.0 [Release Notes]
https://github.com/python-pillow/Pillow/security/advisories/GHSA-fj7v-r99m-22gq [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-59198 at cve.org

Vendors: python-pillow

Weaknesses: CWE-125

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-59198 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.