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cosign

Artifact Management

A tool for signing and verifying OCI container images and other artifacts using Sigstore's keyless signing infrastructure

Go Latest v3.0.6 · 1mo ago Security brief →

Features

  • Keyless signing with Fulcio CA and Rekor transparency log
  • Supports hardware, KMS, and self‑generated key pairs
  • Sign, verify, and store signatures in OCI registries
  • Bring‑your‑own PKI integration

Recent releases

View all 5 releases →
v3.0.6 Mixed
Security fixes
  • Fix DSSE predicate check (GHSA-w6c6-c85g-mmv6)
Notable features
  • Add support for GCE metadata server env var
  • support managed keys in conformance testing
  • support key creation in GitLab group
v3.0.5 Mixed
Security fixes
  • Low-severity advisory for private PKIs (GHSA-wfqv-66vq-46rm)
Notable features
  • Automatically require signed timestamp with Rekor v2 entries
  • Allow --local-image with --new-bundle-format for v2 and v3 signatures
  • Add mTLS support for TSA client connections
v3.0.4 Security relevant
Security fixes
  • Fix bundle verify path for old bundle/trusted root (GHSA-whqx-f9j3-ch6m)
Notable features
  • Optimize cosign tree performance by caching digest resolution
  • Don't require a trusted root to verify offline with a key
  • Support default services for trusted-root and signing-config creation
v2.6.2 Security relevant
Security fixes
  • Fix bundle verify path for old bundle/trusted root (GHSA-whqx-f9j3-ch6m)

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Go Shell Makefile

Install & Platforms

Install via
brew binary
Platforms
linux macos

Community & Support

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