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Medium · 5.3 CVE-2026-123369 EUVD-2026-120126GHSA-6f4g-xm8v-pgv6

compose-lint: Compose file text can issue GitHub Actions workflow commands through the compose-lint Action

Published Nov 9, 2026 · Updated Nov 9, 2026 · Assigned by GitHub_M

Description

compose-lint is a Docker Compose security linter that identifies dangerous misconfigurations before deployment. Prior to 0.31.0, compose-lint prints attacker-controlled service names, environment keys, file lines, and other Compose text without neutralizing GitHub Actions and Azure Pipelines workflow-command openers. When a workflow processes a pull request, legacy ##[ commands or a line-leading double-colon command can create false annotations, hide log regions, mask selected strings, or invoke other commands recognized by the runner. The affected text report paths do not alter the compose-lint exit code or pass or fail result, but they can misrepresent the CI output presented to reviewers. This issue is fixed in version 0.31.0.

Affected products

VendorProductAffectedFixed
tmatens compose-lint < 0.31.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
GitHub Actions tmatens/compose-lint >= 0.2.0, < 0.31.0 0.31.0 GHSA-6f4g-xm8v-pgv6
PyPI compose-lint < 0.31.0 0.31.0 GHSA-6f4g-xm8v-pgv6

References