AcademySoftwareFoundation OpenColorIO has an out-of-bounds vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

1.9 · 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 · score source

EPSS

• CVE-2025-15506: 0.18% estimated exploitation activity in the next 30 days; percentile 7.65 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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.

Published by the source

11 Jan 2026, 12:30 UTC

Last modified by the source

7 Jul 2026, 17:56 UTC

Source last checked

26 Oct 2026, 13:36 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-m86r-wr74-693h

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-m86r-wr74-693h

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# Patch Next advisory brief: CVE-2025-15506

Advisory: AcademySoftwareFoundation OpenColorIO has an out-of-bounds vulnerability
IDs: CVE-2025-15506, GHSA-m86r-wr74-693h
Record: https://patchnext.com/advisories/cve-2025-15506 (revision 3, source checked 26 Oct 2026, 13:36 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 1.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: opencolorio 2.5.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI opencolorio: affected < 2.5.1; fixed in 2.5.1

## Suggested inspection (read-only)
- `python -m pip show opencolorio`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on opencolorio.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-m86r-wr74-693h (OSV record GHSA-m86r-wr74-693h lists affected ranges: PyPI opencolorio >=0 <2.5.1 (fixed))
- Verified: https://github.com/advisories/GHSA-m86r-wr74-693h (GitHub-reviewed advisory GHSA-m86r-wr74-693h lists affected ranges: PyPI opencolorio >=0 <2.5.1)

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