CVE-2026-34588
OpenEXR: OpenEXR: Arbitrary code execution and information disclosure via crafted EXR file
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 7, 2026
Updated · October 2, 2026
Description
A flaw was found in OpenEXR, an image storage format for the motion picture industry. A remote attacker could exploit an integer overflow vulnerability in the internal_exr_undo_piz() function by providing a specially crafted EXR file. This flaw leads to out-of-bounds reads and writes, which may allow for arbitrary code execution or sensitive information disclosure.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-190 · Integer Overflow or Wraparound