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CVE-2026-42217

OpenEXR: Shift exponent overflow in `readVariableLengthInteger()` (`ImfIDManifest.cpp`)

Published: May 7, 2026Updated: May 8, 2026 Sources: CVE List NVDCWE-190
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
0.4%
Top 69.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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, readVariableLengthInteger() decodes a variable-length integer from untrusted EXR input without bounding the shift count. After enough continuation bytes, the code executes a left shift by 70 on a 64-bit value, which is undefined behavior. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-190

Affected Products

openexrAcademySoftwareFoundation
Library
OSS Libraries / generic-library
openexropenexr
LibraryLibrary
OSS Libraries / generic-library
academysoftwarefoundationoss-projectUSOSS Librariesaka openexr, openimageio, materialx
openexross-projectOSS Librariesaka open exr

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
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References

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3c67-4wwp-w52m
github.com
https://github.com/AcademySoftwareFoundation/openexr/pull/2378
github.com
https://github.com/AcademySoftwareFoundation/openexr/commit/21eaa33bcbbb0c83a5fc42f6b6d65b70a996e63c
github.com

Timeline

Published
May 7, 2026
Last Updated
May 8, 2026

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