An API key can look like an ordinary string in a configuration file. A password may have no distinctive prefix at all. That makes accidental credentials harder to spot when a developer is reviewing a busy change.
GitHub's 7 October 2026 update introduces a model that reads surrounding code to identify likely secrets, including passwords without a recognisable token format.
Check which part is available to your team
Customers already using AI-detected password alerts have been moved to the new model. GitHub says these alerts remain included with GitHub Secret Protection and GitHub Advanced Security at no additional charge.
The new push-protection checks are in private preview. Additional checks for the Copilot security-review command are planned for private preview. Those opt-in features have a separate, planned AI Credits billing model.
Before changing a repository's settings, confirm what your plan currently offers and who can authorise it. A feature announcement can describe several stages of availability at once.
Give a real leak a clear owner
An alert needs someone who can establish what the credential accesses and stop it being used. That person may be a developer, the infrastructure team or the administrator of the external service.
GitHub's guidance on exposed sensitive data says the first step for a leaked credential is revocation or rotation. Removing a string from the latest file leaves copies in older commits and elsewhere.
Identify the affected account and permissions, then follow the provider's process to revoke or replace the credential promptly. Use the approved secret store for the replacement, and keep the incident record free of the secret itself.
Check the applications that use it
A credential can support several processes. Updating the main application while missing a scheduled task may turn a security fix into a customer-visible failure.
List the services, workers and deployment jobs that depend on it. After updating them, test representative operations and check that the old credential no longer works.
Review available access logs for unexpected use during the exposure period. Record what the evidence shows and any gaps in visibility. A quiet log is only useful if the relevant activity was recorded in the first place.
Fix the route that put it in the repository
Look at how the credential entered the change. Was a local configuration copied into an example file? Did a test use a live account? Was a deployment export committed alongside source code?
Address that route with the team. Use safe example values, test credentials and a documented way to load secrets into the application. Keep repository checks aligned with the kinds of credentials the project actually uses.
Decide separately whether repository history needs cleaning. GitHub warns that rewriting history has consequences for collaborators and existing clones, so coordinate that work rather than treating it as an automatic first step.
Better detection helps people notice a mistake earlier. A useful response still ends with the exposed credential disabled, dependent services checked and the cause of the leak addressed.
Reporting checked on 13 October 2026. Preview availability and billing follow GitHub's announcement.
