Heap-based buffer overflow in OpenEXR - CVE-2026-59187
Published: August 8, 2026
Vulnerability identifier: #VU141360
CSH Severity: Medium
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59187
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in the exrmetrics tool when parsing a crafted deep scanline EXR file with pixel type conversion enabled. A remote attacker can supply a specially crafted EXR file to cause a denial of service.
User interaction is required to open the crafted file, and the issue is triggered when options such as --pixelmode float or --bench are used.
Affected software
OpenEXR
How to mitigate CVE-2026-59187
Install security update from vendor's website.
OpenEXR - addressed in versions 3.3.13, 3.4.14