How to Audit Your Git Repository for Exposed API Keys and Credentials

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Git's append-only history means credentials accidentally committed — even if later deleted — remain accessible to anyone who clones the repository. Common exposures include AWS access keys, database connection strings, OAuth secrets, and hardcoded .env values found in CI/CD configs, Docker files, and Kubernetes manifests. Developers can audit their current codebase using grep-based regex patterns, while tools like gitleaks and truffleHog can scan the entire commit history, including branches, stashes, and submodules. A frequently overlooked risk is committing .env.example files that contain real credentials copied from working environment files rather than safe placeholders. If a leaked secret is discovered, the recommended response is to revoke and rotate the credential immediately before attempting any history rewrite, since attackers can exploit exposed keys within minutes.

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