CVE-2026-34545
7.3 · HIGHOverview
CVE-2026-34545 is a high-severity vulnerability affecting openexr openexr. It was published on April 1, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. 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 version 3.4.0 to before version 3.4.7, an attacker providing a crafted .exr file with HTJ2K compression and a channel width of 32768 can write controlled data beyond the output heap buffer in any application that decodes EXR images. The write primitive is 2 bytes per overflow iteration or 4 bytes (by another path), repeating for each additional pixel past the overflow point. In this context, a heap write overflow can lead to remote code execution on systems. This issue has been patched in version 3.4.7.
Remediation
Check the references section for vendor advisories and patches from openexr. Update openexr to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| openexr | openexr | >= 3.4.0, < 3.4.7 | Affected |
References
Frequently Asked Questions
What is CVE-2026-34545?
CVE-2026-34545 is a high-severity vulnerability affecting openexr openexr. It was published on April 1, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).
How severe is CVE-2026-34545?
This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-34545?
Check the references section for vendor advisories and patches from openexr. Update openexr to the latest patched version. 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-2026-34545?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-34545 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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