AIKIDO-2026-325984
OpenEXR is vulnerable to Information Disclosure
54
Medium Risk
This Affects:
OpenEXRTL;DR
OpenEXRCore's ZIP scanline unpack path, embedded in the PyPI OpenEXR module, tests vertical subsample alignment with the absolute file row but writes compact FrameBuffer rows from the chunk-local row. Crafted ZIP EXR files with ySampling greater than one therefore shift sampled rows and leave the final sampled row uninitialized. Python applications that decode such files can expose stale buffer contents and incorrect pixel rows. The fix aligns the destination row calculation with the absolute file row.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you decode untrusted ZIP-compressed EXR files that contain vertically subsampled channels.
Background info
OpenEXR is vulnerable to Information Disclosure in versions 3.2.3 - 3.4.13.
How to fix this
Upgrade the OpenEXR library to the patch version.
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SOC 2Compliant
ISO 27001Compliant