CVE-2025-66406

Improper Authorization Check for SSH Certificate Revocation

State: Published
Severity: 5.0 Medium
Published: Dec 3, 2025
Updated: Dec 3, 2025
Reserved: Nov 28, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	5.0 Medium	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H	GitHub_M

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
certificatessmallstep	< 0.29.0Affected

References

https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr

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