Critical Security Flaw in OpenEXR: Arbitrary Code Execution and Information Disclosure
Summary
ALSA-2026:19146: Important: openexr security update. Affects openexr versions < 3.1.10-8.el10_2.2. Fixed in 3.1.10-8.el10_2.2. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
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. The package includes binaries for OpenEXR, which are essential for applications that require advanced image manipulation capabilities. However, a recent vulnerability has been identified that could compromise the integrity and confidentiality of data processed using this format.
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 flaw by creating malicious EXR files that, when opened by vulnerable applications, can execute arbitrary code on the host system. This poses significant risks, including unauthorized access to sensitive information and potential system compromise. The vulnerability affects multiple versions of the OpenEXR package, making it critical for users to address it promptly.
How To Fix
Minimum fixed version
3.1.10-8.el10_2.2
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 workaround, 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 identified vulnerability in OpenEXR poses serious security risks that can lead to arbitrary code execution and information disclosure. Users are strongly encouraged to update their packages to the latest patched versions to safeguard their systems. Implementing additional security measures can further mitigate risks while awaiting updates.
See every vulnerability recorded for openexr →
FAQ
CVE-2026-34588 is a security vulnerability in OpenEXR that allows for arbitrary code execution and information disclosure through crafted EXR files.
You can use Vulert, which monitors open-source vulnerabilities in your software. By uploading your manifest file like package-lock.json, you can receive real-time alerts about vulnerabilities.
The risks include unauthorized access to sensitive data, potential system compromise, and execution of malicious code on the host system.
Yes, avoid opening untrusted EXR files and implement strict file validation and sanitization processes as a temporary measure.
It is recommended to regularly check for updates and security advisories related to OpenEXR to ensure that you are protected against known vulnerabilities.
Related vulnerabilities
Recent vulnerabilities recorded for openexr.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
