# CVE-2026-43906: OpenImageIO heap buffer overflow in HEIF decoder

Source: https://junglewise.ai/threats/cve-2026-43906-openimageio-heap-buffer-overflow-in-heif-decoder  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-14. Updated: 2026-05-15  
License: CC BY 4.0 with a link back

CVE-2026-43906 · Severity: high · CVSS 7.8 · Published 2026-05-14

OpenImageIO is a widely used library for reading and manipulating image files in the visual effects and animation industries. A security flaw in how it handles HEIF (High Efficiency Image File) images could allow an attacker to crash applications or potentially execute malicious code by tricking a user into opening a specially crafted image file. This could lead to data theft or unauthorized access to systems used in media production pipelines.

Technologies: [Academy Software Foundation OpenImageIO](https://junglewise.ai/threats/technologies/openimageio). Vendors: [Academy Software Foundation](https://junglewise.ai/threats/vendors/academy-software-foundation).

## Quick answers

**Is CVE-2026-43906 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-43906 being exploited in the wild.

**How severe is CVE-2026-43906?** High severity, with a CVSS score of 7.8, published 14 May 2026.

**Which products and versions are affected?** Academy Software Foundation OpenImageIO < 3.0.18.0, < 3.1.13.0, Prior to 3.0.18.0 and 3.1.13.0.

**Is there a fix for CVE-2026-43906?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-43906 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-43906?** Check whether you run Academy Software Foundation OpenImageIO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A heap-based buffer overflow (CWE-122) exists in the HEIF decoder component of OpenImageIO. The vulnerability is triggered by a subimage metadata mismatch during the processing of HEIF files, specifically within the `HeifInput::read_native_scanline` function in `heifinput.cpp`. An attacker can exploit this by providing a maliciously crafted HEIF image that causes an out-of-bounds write during a `memcpy` operation. This requires local execution or user interaction (opening the file) and can result in memory corruption or arbitrary code execution. The issue is resolved in versions 3.0.18.0 and 3.1.13.0.

## Affected products

- Academy Software Foundation OpenImageIO < 3.0.18.0, < 3.1.13.0

## Timeline

- 2026-05-03: advisory: GitHub advisory published by maintainers
- 2026-05-14: disclosed: CVE published to NVD

## References

- [https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-gmrp-x952-3m66](https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-gmrp-x952-3m66)

## Related threats

- [OpenImageIO integer overflow in Cineon codec scanline buffer](https://junglewise.ai/threats/cve-2026-113681-openimageio-before-3-0-20-0-3-1-x-before-3-1-15-0-and-3-2-x)
- [OpenImageIO heap overflow in TIFF CMYK decoding](https://junglewise.ai/threats/cve-2026-67549-openimageio-is-a-toolset-for-reading-writing-and-manipulating)
- [OpenImageIO use-after-scope in multithreaded TIFF decompression](https://junglewise.ai/threats/cve-2026-65970-openimageio-is-a-toolset-for-reading-writing-and-manipulating)
- [OpenImageIO integer overflow in GIF palette splitting](https://junglewise.ai/threats/cve-2026-65969-openimageio-is-a-toolset-for-reading-writing-and-manipulating)
- [OpenImageIO heap overflow in cineon image parsing](https://junglewise.ai/threats/cve-2026-63638-openimageio-is-a-toolset-for-reading-writing-and-manipulating)