Heap-based buffer overflow in OpenEXR - CVE-2026-45696
Published: May 25, 2026
Vulnerability identifier: #VU132247
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-45696
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenEXR
Affected software:
OpenEXR
OpenEXR
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.
The vulnerability exists due to a heap-based buffer overflow in ht_undo_impl() in OpenEXRCore when parsing a crafted EXR file containing an HTJ2K codestream with smaller line dimensions than declared in the EXR header. A remote attacker can supply a specially crafted EXR file to cause a denial of service and disclose sensitive information.
User interaction is required to open a crafted EXR file.
How to mitigate CVE-2026-45696
Install security update from vendor's website.