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7.1 High

CVE-2026-59186 OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture…

Description

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D<Rgba> tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.

Affected products and versions

Product Affected versions Fixed in
openexr 3.4 3.4.0 → < 3.4.14 3.4.14
openexr 3.3 3.3.0 → < 3.3.13 3.3.13
openexr 3.2 earliest → < 3.2.11 3.2.11

References

Timeline

  1. Published
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Other CVEs of openexr

The 47 CVEs of openexr →
CVE-2026-59981 OpenEXR is the reference implementation and specification for the EXR image file format, widely used in the motion… 7.1 High CVE-2026-68514 OpenEXR is the reference implementation and specification for the EXR image file format, widely used in the motion… 5.5 Medium CVE-2026-68515 OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture… 7.1 High CVE-2026-68513 OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture… 7.1 High
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