Out-of-bounds Write Affecting openexr package, versions [3.1.4,3.2.7)[3.3.0,3.3.9)[3.4.2,3.4.9)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-OPENEXR-15993031
- published12 Apr 2026
- disclosed8 Apr 2026
- creditquangIO
Introduced: 8 Apr 2026
NewCVE-2026-34588 (opens in a new tab)How to fix?
Upgrade openexr to version 3.2.7, 3.3.9, 3.4.9 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write through the internal_exr_undo_piz process. An attacker can cause out-of-bounds memory access, leading to potential memory corruption or process crash, by supplying a specially crafted EXR file that triggers signed integer overflow and subsequent invalid buffer operations.