# CVE-2026-43909: OpenImageIO integer overflow in SwapRGBABytes DPX decoder

Source: https://junglewise.ai/threats/cve-2026-43909-openimageio-integer-overflow-in-swaprgbabytes-dpx-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-2026-43909 · Severity: high · CVSS 8.8 · Published 2026-05-14

OpenImageIO is a widely used library for processing image files in the visual effects and animation industries. A vulnerability in how it handles specific high-resolution image files (DPX format) could allow an attacker to crash applications or potentially execute unauthorized code. This occurs when a user is tricked into opening a specially crafted, large image file, which could lead to data theft or a complete system compromise.

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-2026-43909 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-43909 being exploited in the wild.

**How severe is CVE-2026-43909?** High severity, with a CVSS score of 8.8, published 14 May 2026.

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

**Is there a fix for CVE-2026-43909?** 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-2026-43909 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-43909?** 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 signed 32-bit integer overflow exists in the SwapRGBABytes() function within DPXColorConverter.cpp. The vulnerability is triggered when processing kABGR DPX images with large dimensions where the total pixel count (Width * Height) exceeds INT_MAX/4. This causes the loop index expression 'i * 4' to overflow, resulting in a large negative pointer offset. An attacker can exploit this to achieve a combined out-of-bounds (OOB) read and write primitive. The attack requires a user to open a crafted DPX file (User Interaction required). 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-g267-j53j-5258](https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-g267-j53j-5258)

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