CVE-2026-54058 — 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-2026-54058HIGH

python-pillow Pillow — Pillow: Out-of-bounds read via attacker-controlled row stride on Pillow's mmap path (McIdas AREA files)

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   P   N   N   H   N   H    8.3   .0048   39.3     —

AFFECTED
  Product  Versions    Fixed
  Pillow   < 12.3.0 –  —

TIMELINE
  Jun 11  Reserved by GitHub_M
  Jul 14  EXPLOIT PUBLISHED — CVE-2026-54058 (python-pillow Pillow). Public exploit reference added.
  Jul 14  Published (CNA: GitHub_M)

CWE-125 · CNA: GitHub_M · CVSS v4.0 · 4 references · NVD status: Analyzed

Description

Pillow is a Python imaging library. Prior to 12.3.0, when Pillow loads an uncompressed McIdas AREA image from a filename through the mmap raw codec path, attacker-controlled header words can set a row stride smaller than the natural row width, causing pixel access such as Image.tobytes(), getpixel, convert, or save to read beyond the mapped region and disclose adjacent process memory or fault. This issue is fixed in version 12.3.0.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 11, 2026	Reserved	Reserved by GitHub_M
July 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-54058 (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	—	< 12.3.0	—

Weaknesses

CWE-125

References (4)

https://github.com/python-pillow/Pillow/commit/6a8de891fb00968e5ea79bfa84368ed90b3cfc1d [Patch]
https://github.com/python-pillow/Pillow/pull/9719 [Issue Tracking, Patch]
https://github.com/python-pillow/Pillow/releases/tag/12.3.0 [Product, Release Notes]
https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93 [Exploit, Mitigation, Vendor Advisory]

Authoritative record: CVE-2026-54058 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-2026-54058 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.