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  4. CVE 2026 68513 openexr heap buffer overflow in pyopenexr from
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Back to active CVEs
High · CVSS 7.1CVE-2026-68513

OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collisionCVE-2026-68513

Answer in brief

CVE-2026-68513 records a High severity (CVSS 7.1) vulnerability in OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collision. The current sources do not mark it as known exploited. The current feed maps AcademySoftwareFoundation/openexr (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 25, 2026Updated Sep 9, 2026Source checked Oct 9, 2026First seen by HOL Aug 25, 2026Material review Sep 9, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps AcademySoftwareFoundation/openexr (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
AcademySoftwareFoundation/openexrgeneric>=3.3.0 <3.3.13 || >=3.4.0 <3.4.143.3.13, 3.4.14

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for AcademySoftwareFoundation/openexr.
  2. 2Review the reported fix. Update AcademySoftwareFoundation/openexr to 3.3.13 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 25, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. Versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13 contain a heap buffer overflow in PyOpenEXR triggered by a channel-name key collision between literal and prefixed RGB channels. When separate_channels=false, PyOpenEXR maps each physical channel name through channelNameToRGBA() and coalesces the results into a shared RGB array. A crafted flat scanline EXR that contains both a literal channel such as left and prefixed channels such as left.R, left.G, and left.B causes these names to collide, so the wrapper reuses an undersized two-dimensional NumPy array for the coalesced RGB slices and writes out of bounds when OpenEXR.File(path) decodes the pixels. This issue is fixed in versions 3.3.13 and 3.4.14.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-122, CWE-787
Source
CVE List V5
Source checked
Oct 9, 2026
References
3 linked sources
Open source record