**security (yaml.github-actions.security.third-party-action-not-pinned-to-commit-sha):** An action sourced from a third-party repository on GitHub is not pinned to a full length commit SHA. Pinning an action to a full length commit SHA is currently the only way to use an action as an immutable release. Pinning to a particular SHA helps mitigate the risk of a bad actor adding a backdoor to the action's repository, as they would need to generate a SHA-1 collision for a valid Git object payload. #116
Description
security (yaml.github-actions.security.third-party-action-not-pinned-to-commit-sha): An action sourced from a third-party repository on GitHub is not pinned to a full length commit SHA. Pinning an action to a full length commit SHA is currently the only way to use an action as an immutable release. Pinning to a particular SHA helps mitigate the risk of a bad actor adding a backdoor to the action's repository, as they would need to generate a SHA-1 collision for a valid Git object payload.
Source: opengrep
Originally posted by @sourcery-ai[bot] in #114 (comment)