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CVE-2026-42216EXPLOITED
openexr · openexr

OpenEXR: Out-of-bounds read in `IDManifest::init()` during prefix expansion

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.

Affected Products

VendorProductVersions
openexropenexr>= 3.0.0, < 3.2.9, >= 3.3.0, < 3.3.11, >= 3.4.0, < 3.4.11

References

  • https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-65j8-95g9-jgj4(x_refsource_CONFIRM)

Related News (1 articles)

Tier C
VulDB4d ago
CVE-2026-42216 | AcademySoftwareFoundation OpenEXR up to 3.2.8/3.3.10/3.4.10 EXR File IDManifest::init out-of-bounds (GHSA-65j8-95g9-jgj4 / EUVD-2026-28298)
→ No new info (linked only)
CISA KEV❌ No
Actively exploited✅ Yes
CWECWE-125
PublishedMay 7, 2026
Last enriched4d agov2
Trending Score29
Source articles1
Independent1
Info Completeness7/14
Missing: cvss, epss, kev, exploit, patch, iocs, mitre_attack

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Related CVEs (5)

CRITICALCVE-2026-34588EXP
OpenEXR has a signed 32-bit Overflow in PIZ Decoder Leads to OOB Read/Write
Trending: 63
MEDIUMCVE-2026-39886EXP
OpenEXR has HTJ2K Signed Integer Overflow in ht_undo_impl()
Trending: 3
NONECVE-2026-40244EXP
OpenEXR has integer overflow in DWA setupChannelData planarUncRle pointer arithmetic (missed variant of CVE-2026-34589)
Trending: 2
NONECVE-2026-40250EXP
OpenEXR has integer overflow in DWA decoder outBufferEnd pointer arithmetic (missed variant of CVE-2026-34589)
Trending: 2
HIGHCVE-2026-34379
OpenEXR has a misaligned write in LossyDctDecoder_execute leading to undefined behavior (DWA/DWAB decompression)
Trending: 1

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
May 7, 2026
Discovered by ZDM
May 7, 2026
Updated: description, severity, affectedVersions, activelyExploited
May 7, 2026
Actively Exploited
May 7, 2026

Version History

v2
Last enriched 4d ago
v2Tier C4d ago

Updated severity to CRITICAL, added affected versions up to 3.2.8/3.3.10/3.4.10, and noted that no exploit exists.

descriptionseverityaffectedVersionsactivelyExploited
via VulDB
v14d ago

Initial creation