CVE-2026-42217
MEDIUM EPSS 31.1%
Published May 7, 20261mo ago · Modified Jun 17, 20262w ago
6.3 CVSS 4.0
Published May 7, 2026 1mo 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 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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/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 Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
31.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available
Weaknesses 1
CWE-190 Integer Overflow or Wraparound Numeric Error
Affected Products 3
References 3
- github.com https://github.com/AcademySoftwareFoundation/openexr/commit/21eaa33bcbbb0c83a5fc42f6b6d65b70a996e63c
- github.com https://github.com/AcademySoftwareFoundation/openexr/pull/2378
- github.com https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3c67-4wwp-w52m
Remediation
- github.com https://github.com/AcademySoftwareFoundation/openexr/commit/21eaa33bcbbb0c83a5fc42f6b6d65b70a996e63c
- github.com https://github.com/AcademySoftwareFoundation/openexr/pull/2378