Incorrect Type Conversion or Cast Affecting openexr package, versions [3.2.3,3.2.7)[3.3.0,3.3.9)[3.4.0,3.4.9)
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-PYTHON-OPENEXR-15993246
- published12 Apr 2026
- disclosed6 Apr 2026
- creditpwn2woot
Introduced: 6 Apr 2026
NewCVE-2026-34379 (opens in a new tab)How to fix?
Upgrade OpenEXR to version 3.2.7, 3.3.9, 3.4.9 or higher.
Overview
OpenEXR is a Python bindings for the OpenEXR image file format
Affected versions of this package are vulnerable to Incorrect Type Conversion or Cast in the LossyDctDecoder_execute process when decoding DWA or DWAB-compressed files containing FLOAT-type channels. An attacker can cause undefined behavior, potentially leading to application crashes or unintended code execution, by supplying specially crafted EXR files that trigger misaligned memory writes. This is only exploitable if the target system enforces strict memory alignment (such as ARM or RISC-V architectures), or if compiler optimizations assume aligned access.