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CVE-2026-42216

Critical · CVSS 9.1

OpenEXR — Out-of-bounds read (OOB read) in prefix-compressed string reconstruction

CVSS
9.1
nvd
EPSS
0.38%
30th pct
KEV
No
Class
oss containerizable
CWE-125, CWE-130

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed representation. If the previous string is longer than 255 bytes, the next string is expected to begin with a 2-byte prefix length. The code reads stringList[i][0] and stringList[i][1] without checking that the current string has at least two bytes. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.

Search profile — drives PoC discovery

Symbols IDManifest::init()stringListstringList[i][0]stringList[i][1]prefix-compressedIDManifestOpenEXRCoreEXR
Keywords CVE-2026-42216OpenEXRIDManifest initout-of-bounds readprefix compressionGHSA-65j8-95g9-jgj4EXR image parsingstringList bounds checkCWE-125CWE-130AcademySoftwareFoundation openexr
Versions: 3.0.0 to <3.2.9, 3.3.0 to <3.3.11, 3.4.0 to <3.4.11

Ranked PoCs (1) — best first

Heuristic ranking — not yet expert-vetted. Scored on structure + provenance, not execution.

Recall-favoring discovery; ranking by the Stage-4 scorer (Adam's rubric). Scanner/aggregator repos are hidden.

References

Status: enriched · ingested 2026-06-30T06:00:22.000Z · profiled 2026-07-01T12:30:14.000Z