CVE-2026-68513 (GCVE-0-2026-68513)

Vulnerability from cvelistv5 – Published: 2026-08-25 19:06 – Updated: 2026-08-28 22:34
VLAI
Title
OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collision
Summary
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.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 22:33 UTC
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7661 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
AcademySoftwareFoundation openexr Affected: >= 3.3.0, < 3.3.13
Affected: >= 3.4.0, < 3.4.14
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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