CVE-2026-34545

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 3.4.7, an attacker providing a crafted .exr file with HTJ2K compression and a channel width of 32768 can write controlled data beyond the output heap buffer in any application that decodes EXR images. The write primitive is 2 bytes per overflow iteration or 4 bytes (by another path), repeating for each additional pixel past the overflow point. In this context, a heap write overflow can lead to remote code execution on systems. This issue has been patched in version 3.4.7.

CVSS v3 7.3 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.3 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/AcademySoftwareFoundation/openexr/commit/3827998f5c041d6a94c6af24bbb363daa669e4b3	Patch
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.7	Product Release Notes
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-ghfj-fx47-wg97	Exploit Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-34545
https://bugzilla.redhat.com/show_bug.cgi?id=2454139
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34545.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-01 21:17

Updated : 2026-07-15 02:20

NVD link : CVE-2026-34545

Mitre link : CVE-2026-34545

CVE.ORG link : CVE-2026-34545

JSON object : View

Products Affected

openexr

openexr

CWE

CWE-122

Heap-based Buffer Overflow

CWE-190

Integer Overflow or Wraparound

CWE-1284

Improper Validation of Specified Quantity in Input

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