AcademySoftwareFoundation OpenEXR up to 3.2.10/3.3.12/3.4.13 TiledRgbaInputFile out-of-bounds write

Summaryinfo

A vulnerability categorized as problematic has been discovered in AcademySoftwareFoundation OpenEXR up to 3.2.10/3.3.12/3.4.13. This affects an unknown part of the component TiledRgbaInputFile. Such manipulation leads to out-of-bounds write. This vulnerability is traded as CVE-2026-59186. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in AcademySoftwareFoundation OpenEXR up to 3.2.10/3.3.12/3.4.13. It has been rated as problematic. Affected by this issue is an unknown functionality of the component TiledRgbaInputFile. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-59186 since 07/02/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 3.2.11, 3.3.13 or 3.4.14 eliminates this vulnerability.

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Productinfo

Vendor

• AcademySoftwareFoundation

Name

• OpenEXR

Version

• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.2.4
• 3.2.5
• 3.2.6
• 3.2.7
• 3.2.8
• 3.2.9
• 3.2.10
• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 3.3.5
• 3.3.6
• 3.3.7
• 3.3.8
• 3.3.9
• 3.3.10
• 3.3.11
• 3.3.12
• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 3.4.5
• 3.4.6
• 3.4.7
• 3.4.8
• 3.4.9
• 3.4.10
• 3.4.11
• 3.4.12
• 3.4.13

License

• open-source

Website

• Product: https://github.com/AcademySoftwareFoundation/openexr/

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