Is CVE-2026-42216 actively exploited?

No active exploitation of CVE-2026-42216 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42216 be exploited remotely?

Yes. CVE-2026-42216 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42216?

CVE-2026-42216 has a CVSS score of 9.1 (CRITICAL).

HOME VULNERABILITIESCVE-2026-42216

CRITICAL

CVE-2026-42216

CWE-125Published: May 7, 2026· Updated: May 8, 2026

9.1

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.8th

Official Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed representation. If the previous string is longer than 255 bytes, the next string is expected to begin with a 2-byte prefix length. The code reads stringList[i][0] and stringList[i][1] without checking that the current string has at least two bytes. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.

NVD Source

Technical Analysis

CVE-2026-42216 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.