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CVE-2025-66406

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Date: December 3, 2025

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.

Severity Score

Related Resources (4)

https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr
https://nvd.nist.gov/vuln/detail/CVE-2025-66406
https://github.com/smallstep/certificates
https://www.mend.io/vulnerability-database/CVE-2025-66406

Severity Score

Weakness Type (CWE)

Improper Authorization

CWE-285

Incorrect Authorization

CWE-863

Top Fix

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Upgrade Version

Upgrade to version github.com/smallstep/certificates - v0.29.0

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): HIGH

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