Use of uninitialized resource in OpenEXR - CVE-2026-62986
Published: August 8, 2026
Vulnerability identifier: #VU141328
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-62986
CWE-ID: CWE-908
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to use of uninitialized resource in PyOpenEXR deep RGB channel coalescing in PyPart::setDeepSliceData() when parsing an attacker-controlled deep scanline EXR file through the default OpenEXR.File(path) API. A remote attacker can supply a specially crafted EXR file to disclose sensitive information.
User interaction is required to open a crafted EXR file, and the issue affects deep images with layer-prefixed RGB channels when separate_channels is disabled.
Affected software
OpenEXR
How to mitigate CVE-2026-62986
Install security update from vendor's website.
OpenEXR - addressed in versions 3.3.13, 3.4.14