SB2026040876 - Heap-based buffer overflow in OpenEXR
Published: April 8, 2026
Security Bulletin ID
SB2026040876
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2026-34545)
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to heap-based buffer overflow in the HTJ2K decoder in internal_ht.cpp when parsing a crafted EXR file with HTJ2K compression. A remote attacker can supply a specially crafted EXR file to execute arbitrary code.
User interaction is required to open or otherwise process the crafted file.
Remediation
Install update from vendor's website.