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BreachesMay 19, 2026

CISA credential leak raises alarms, and Capitol Hill demands answers

CISA credential leak exposes AWS GovCloud and internal system access on GitHub; Congress demands answers.

A public GitHub repository maintained by contractor Nightwing exposed sensitive CISA credentials for privileged AWS GovCloud accounts and internal systems dating back to November. GitGuardian discovered the leak, which security researchers called one of the worst exposures they've witnessed, with concerns about state actors potentially gaining persistence in U.S. government infrastructure. House and Senate Democratic leaders have demanded briefings from CISA on how the breach occurred, its impact, and remediation efforts.

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  • domain — github.com

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CISA (Cybersecurity and Infrastructure Security Agency) (vendor)GitGuardian (vendor)Nightwing (vendor)AWS GovCloud (product)GitHub (technology)