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CVE-2026-34589

5.0 · MEDIUM

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry.

Published Apr 6, 2026CWE-190EPSS 0.48%

Overview

CVE-2026-34589 is a medium-severity vulnerability. It was published on April 6, 2026 and has a CVSS 3.1 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7GitHubgithub.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9GitHubgithub.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9GitHubgithub.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64xRefaccess.redhat.com/security/cve/CVE-2026-34589Refbugzilla.redhat.com/show_bug.cgi?id=2455411Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34589.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-34589?

CVE-2026-34589 is a medium-severity vulnerability. It was published on April 6, 2026 and has a CVSS 3.1 base score of 5.0 (MEDIUM).

How severe is CVE-2026-34589?

This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-34589?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-34589?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-34589 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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