Step CA Has Authorization Bypass in ACME and SCEP Provisioners

Open Source Vulnerabilities CVE-2025-44005

An attacker can bypass authorization checks and force a Step CA ACME or SCEP provisioner to create certificates without completing certain protocol authorization checks.

Open Source Vulnerabilities GHSA-h8cp-697h-8c8p

## Summary A security fix is now available for Step CA that resolves a vulnerability affecting deployments configured with ACME and/or SCEP provisioners. All operators running these provisioners should upgrade to the latest release (`v0.29.0`) immediately. The issue was discovered and disclosed by a research team during a security review. There is no evidence of active exploitation. To limit exploitation risk during a coordinated disclosure window, we are withholding detailed technical information for now. A full write-up will be published in several weeks. --- ## Embargo List If your organization runs Step CA in production and would like advance, embargoed notification of future security updates, visit https://u.step.sm/disclosure to request inclusion on our embargo list. --- ## Acknowledgements This issue was identified and reported by Stephen Kubik of the Cisco Advanced Security Initiatives Group (ASIG) --- Stay safe, and thank you for helping us keep the ecosystem secure.

Open Source Vulnerabilities GO-2025-4180

Step CA Has Authorization Bypass in ACME and SCEP Provisioners in github.com/smallstep/certificates