What’s Vulnerable › Vulnerabilities
CVE-2025-66406: Improper Authorization Check for SSH Certificate Revocation
- Severity: medium (CVSS 5.0 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-03 · updated 2026-10-18
- Weakness: CWE-863
Description
Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affects deployments configured with the SSHPOP provisioner. This vulnerability is fixed in 0.29.0.
Affected products
- Go Github.Com/Smallstep/Certificates: before 0.29.0 — fixed in 0.29.0
- smallstep certificates: before 0.29.0
How to fix
Upgrade to a fixed version: Go Github.Com/Smallstep/Certificates 0.29.0. Check the vendor advisory for mitigations.
References
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