CVE-2026-34543 Details
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.
A vulnerability allowing sensitive information from heap memory to be leaked through decoded pixel data has been identified in OpenEXR versions 3.4.0 prior to 3.4.8. This issue arises in the PXR24 decompression function, which improperly handles the actual size of decompressed data, leading to the inclusion of uninitialized memory in the output. The vulnerability can be exploited by simply reading a malicious EXR file, without any user interaction.
Users can upgrade to OpenEXR version 3.4.8, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 2, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-908 | Use of Uninitialized Resource | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openexr openexr | >= 3.2.0, < 3.2.7 >= 3.3.0, < 3.3.9 >= 3.4.0, < 3.4.8 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 7, 2026 | Initial Analysis | [email protected] |
| Apr 2, 2026 | CVE Modified | CISA-ADP |
| Apr 1, 2026 | New CVE Received | [email protected] |