# CVE-2026-65970: OpenImageIO use-after-scope in multithreaded TIFF decompression

Source: https://junglewise.ai/threats/cve-2026-65970-openimageio-is-a-toolset-for-reading-writing-and-manipulating  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-18. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-65970 · Severity: medium · CVSS 5.3 · Published 2026-09-18

OpenImageIO is a media processing library used in animation and VFX workflows to read and manipulate image files. A crafted ZIP-compressed TIFF file processed with multithreading enabled can cause the application to crash, disrupting production pipelines and affecting availability of rendering or compositing services.

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-2026-65970 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-65970 being exploited in the wild.

**How severe is CVE-2026-65970?** Medium severity, with a CVSS score of 5.3, published 18 September 2026.

**Which products and versions are affected?** Academy Software Foundation OpenImageIO prior to 3.1.16.0.

**Is there a fix for CVE-2026-65970?** A patch was published on 2026-07-04: Fix merged to main branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-65970 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-65970?** 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 use-after-scope vulnerability exists in the TIFF input handler's multithreaded scanline decompression path. When TIFFInput::read_native_scanlines() exits early on certain error conditions, background worker tasks attempt to access stack variables (ok and compressed_scratch) after they have been destroyed, resulting in a denial of service crash. The vulnerability requires TIFF multithreading to be enabled and a specially crafted compressed TIFF file as input.

## Affected products

- Academy Software Foundation OpenImageIO prior to 3.1.16.0

## Timeline

- 2026-09-18: disclosed
- 2026-07-04: patched: Fix merged to main branch

## References

- [https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/31201c22df477b105b105c0dcfbf5d3d46db431b](https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/31201c22df477b105b105c0dcfbf5d3d46db431b)
- [https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5294](https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5294)

## 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 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)
- [OpenImageIO out-of-bounds read in PSD parser](https://junglewise.ai/threats/cve-2026-63635-openimageio-is-a-toolset-for-reading-writing-and-manipulating)