CVE-2026-34543
High
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 3.4.8, sensitive information from heap memory may be leaked through the decoded pixel data (information disclosure). This occurs under default settings; simply reading a malicious EXR file is sufficient to trigger the issue, without any user interaction. This issue has been patched in version 3.4.8.
SeverityHigh
CVSS7.5
Exploit probability—
ProductOpenexr
PublishedApr 1, 2026
First seenApr 1, 2026
Weakness typeCWE-908CWE-908
How to fix
Update
- openexr openexr3.2.7, 3.3.9, 3.4.8 or later
- openexr3.4.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openexr openexr | 3.2.0 ≤ v < 3.2.7, 3.3.0 ≤ v < 3.3.9, 3.4.0 ≤ v < 3.4.8 | 3.2.7, 3.3.9, 3.4.8 |
| openexrPyPI | 3.4.0 ≤ v < 3.4.8, 3.3.0 ≤ v ≤ 3.3.8, 3.2.0 ≤ v ≤ 3.2.6, 3.2.0 ≤ v < 3.4.8 | 3.4.8 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.