CVE-2026-34588
HIGH EPSS 16.6%
Published Apr 6, 20262mo ago · Modified Jun 17, 20262w ago
8.6 CVSS 4.0
Published Apr 6, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago
Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
16.6% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available
Weaknesses 3
CWE-125 Out-of-bounds Read Memory Safety
CWE-190 Integer Overflow or Wraparound Numeric Error
CWE-787 Out-of-bounds Write Memory Safety
Affected Products 3
References 4
- github.com https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7
- github.com https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9
- github.com https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9
- github.com https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-588r-cr5c-w6hf
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.