Critical Vulnerability in OpenEXR Package: Arbitrary Code Execution and Information Disclosure
Summary
RLSA-2026:15888: Important: openexr security update. Affects openexr versions < 0:3.1.10-8.el10_1.2. Fixed in 0:3.1.10-8.el10_1.2. How to fix ↓
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Background
OpenEXR is an open-source high-dynamic-range floating-point image file format designed for high-quality image processing and storage. It is widely used in visual effects and animation industries due to its ability to handle complex image data efficiently. However, the package is susceptible to security vulnerabilities that can lead to severe consequences if exploited.
Vulnerability Detail
The vulnerability identified as CVE-2026-34588 allows for arbitrary code execution and information disclosure through the processing of crafted EXR files. Attackers can exploit this vulnerability by crafting malicious EXR files that, when opened by vulnerable applications, can execute arbitrary code on the host system or disclose sensitive information. This poses a significant risk to users and systems that rely on OpenEXR for image processing.
How To Fix
Minimum fixed version
0:3.1.10-8.el10_1.2
This is the first release that contains the fix.
sudo dnf update openexrTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users are advised to avoid opening untrusted EXR files until the package is updated. Additionally, implementing strict file validation and sanitization processes can help mitigate the risk of exploitation.
Conclusion
The OpenEXR package has a critical vulnerability that can lead to arbitrary code execution and information disclosure. It is essential for users to update to the patched version to protect their systems. Implementing workarounds can provide temporary relief until the update is applied.
See every vulnerability recorded for openexr →
FAQ
CVE-2026-34588 is a security vulnerability in the OpenEXR package that allows for arbitrary code execution and information disclosure through crafted EXR files.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
If an immediate update is not possible, refrain from opening untrusted EXR files and consider implementing file validation measures.
Exploitation of this vulnerability can lead to arbitrary code execution on the host system and potential disclosure of sensitive information, posing significant security risks.
The CVSS score for this vulnerability is 8.8, indicating a high severity level.
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