Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-65969

CVE-2026-65969MEDIUM

AcademySoftwareFoundation OpenImageIO — OpenImageIO: TGA-to-GIF palette split signed overflow causes SIGSEGV

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   N   R  U  N  N  H    5.5   .0020    8.4     —

AFFECTED
  Product      Versions      Fixed
  OpenImageIO  < 3.0.21.0 –  —

TIMELINE
  Jul 23  Reserved by GitHub_M
  Sep 18  Published (CNA: GitHub_M)
  Sep 29  EXPLOIT PUBLISHED — CVE-2026-65969 (AcademySoftwareFoundation OpenImageIO). Public exploit reference added.

CWE-125, CWE-190 · CNA: GitHub_M · CVSS v3.1 · 5 references · NVD status: Analyzed

Description

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A truncated tga can leave a pending gif frame that is processed during output close. gifsplitpalette() computes numpixels multiplied by the palette partition width in signed 32-bit arithmetic; a large image overflows that intermediate, corrupts subpixelsa, and drives an out-of-bounds read while building the gif palette, resulting in a process crash and denial of service. The affected implementation is identified by src/gif.imageio/gif.h, GifSplitPalette(), numPixels, subPixelsA, GIFOutput, and truncated TGA input, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 23, 2026	Reserved	Reserved by GitHub_M
September 18, 2026	Published	Published (CNA: GitHub_M)
September 29, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-65969 (AcademySoftwareFoundation OpenImageIO). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
AcademySoftwareFoundation	OpenImageIO	—	< 3.0.21.0	—

Weaknesses

CWE-125 · CWE-190

References (5)

https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/134977da625a84fc5a09a34321806f1fe0093c24 [Patch]
https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5292 [Issue Tracking, Patch]
https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0 [Release Notes]
https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0 [Release Notes]
https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-9mwc-fjgj-8wmq [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-65969 at cve.org

Vendors: academysoftwarefoundation

Weaknesses: CWE-125 · CWE-190

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-65969 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 Saturday, October 3, 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.