Out-of-bounds read in OpenEXR - CVE-2026-42216
Published: May 5, 2026
Vulnerability identifier: #VU129652
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-42216
CWE-ID: CWE-125
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 disclose sensitive information or cause a denial of service.
The vulnerability exists due to out-of-bounds read in IDManifest::init() in src/lib/OpenEXR/ImfIDManifest.cpp when parsing a prefix-compressed IDManifest string list from a crafted .exr file. A remote attacker can supply a specially crafted file to disclose sensitive information or cause a denial of service.
Exploitation requires the previous string to be longer than 255 bytes so that the 2-byte prefix-length path is used, and the next string to be empty.
How to mitigate CVE-2026-42216
Install security update from vendor's website.