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CVE-2026-34543

OpenEXR: Heap information disclosure in PXR24 decompression via unchecked decompressed size (undo_pxr24_impl)

Published: Apr 1, 2026Updated: Apr 7, 2026 Sources: CVE List NVDCWE-908
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.5%
Top 62.3%
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 version 3.4.0 to before version 3.4.8, sensitive information from heap memory may be leaked through the decoded pixel data (information disclosure). This occurs under default settings; simply reading a malicious EXR file is sufficient to trigger the issue, without any user interaction. This issue has been patched in version 3.4.8.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
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:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-908

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
Collection
View detailed technique mapping

References

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432
github.com
https://github.com/AcademySoftwareFoundation/openexr/commit/5f6d0aaa9e43802917af7db90f181e88e083d3b8
github.com
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8
github.com

Timeline

Published
Apr 1, 2026
Last Updated
Apr 7, 2026

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