CVE-2026-125123 compose-lint: File paths embedded in pull requests can inject CI workflow commands through command-line error messages
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-125123?
CVE-2026-125123 is a low-severity vulnerability in tmatens compose-lint, published on 10 Nov 2026.
Official description
compose-lint is a Docker Compose security linter that identifies dangerous misconfigurations before deployment. In version 0.31.0, compose-lint's argument parser writes rejected repository paths to stderr without the output sanitizer when a path is passed without a preceding -- separator. A pull request can supply a path containing workflow-command syntax; a carriage return can position that command at the start of a new line recognized by the GitHub Actions runner, allowing the package, Docker image, or a pre-commit hook with misconfigured args to issue the command in the job log. The default pre-commit configuration includes -- and is not affected, the GitHub Action is not affected, and the lint pass or fail result is unchanged. This issue is fixed in version 0.32.0.
Which versions are affected by CVE-2026-125123?
1 open source package ship an affected version, including compose-lint.
| Package | Affected | Fixed in |
|---|---|---|
compose-lint PyPI | From 0.31.0 | 0.32.0 |
How do I fix CVE-2026-125123?
Upgrade compose-lint to 0.32.0 or later.
Is CVE-2026-125123 being exploited?
There is no known exploitation of CVE-2026-125123 in the wild and no public exploit code.
Sources
Also known as GHSA-8v59-qmwv-4p6q.