An AI agent runs with your credentials and acts before you can stop it. Nine incidents show what that costs. Six controls limit the damage: sandbox the agent, scope its credentials, lock its configuration, log every call, scan the workspace first, and deny by default.
The GhostAction supply chain campaign hit 772 public GitHub repositories between Aug. 31 and Sept. 30, 2026, targeting 2,577 secrets. Between Oct 8-9 a new burst hit 30k more, and this time the workflows ran.
A leaked n8n API key is only the start. GitGuardian's research traces the full chain, from exposed tokens and weak keys to CVE-2026-25053 and the N8N_ENCRYPTION_KEY that protects every stored credential, then lays out a hardened configuration to break it.
After the CISA GitHub leak, the agency published a candid incident postmortem. Here are six lessons security teams should copy, from secrets scanning to key rotation.
We found 62 live PyPI tokens leaking on public sources, enough to push malicious code to 125 packages with 25,000 monthly downloads. We reported them to PyPI, which revoked every one. Here's how we decoded the macaroons and checked which still worked.
A single leaked Kubernetes credential rarely stays in the cluster. It opens the registry credentials, private Docker images, and private GitHub repositories behind it. In Q1 2026 alone, our detectors caught close to 2,000 new such leaks on GitHub, 28% valid at leak time.
On May 14, GitGuardian found a public GitHub repository called "Private-CISA" — 844 MB of plain-text passwords, AWS tokens, and Entra ID SAML certificates belonging to CISA, exposed since November 2025. Some credentials were still valid. CISA pulled it offline within 26 hours.
A self-replicating worm is actively compromising packages with 3M+ weekly downloads, hijacking tokens from CI/CD pipelines, and bypassing trusted publishing protections.
GitGuardian analysis of the @bitwarden/cli compromise: GitHub used as C2, new Cloudflare exfiltration domain found, linked to April 22 Checkmarx KICS compromise via Dependabot.
Three supply chain attacks hit npm, PyPI, and Docker Hub between April 21–23, 2026. All three targeted secrets: API keys, cloud credentials, SSH keys, and tokens from developer environments and CI/CD pipelines.
Vercel's Context.ai breach exposed environment variables that weren't marked sensitive. Learn how to pull and scan your secrets with GitGuardian.
What resonated most at RWC 2026? GitGuardian highlights key research on private key leaks, password managers, trusted execution environments, and secret sprawl.
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