CVE-2025-66406
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-03

Last updated on: 2025-12-04

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2025-12-03
Last Modified
2025-12-04
Generated
2026-06-16
AI Q&A
2025-12-03
EPSS Evaluated
2026-06-15
NVD
CVE-2025-66406
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
smallstep step_ca 0.28.4
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
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Executive Summary

This vulnerability in Step CA, prior to version 0.29.0, involves an improper authorization check for SSH certificate revocation when using the SSHPOP provisioner. This means that the system may allow unauthorized actions related to revoking SSH certificates, potentially leading to security issues. The vulnerability is fixed in version 0.29.0.

Impact Analysis

The vulnerability can impact you by allowing improper authorization in SSH certificate revocation, which could lead to unauthorized revocation or failure to revoke SSH certificates properly. This may result in denial of service or disruption of SSH access, affecting availability and integrity of systems relying on these certificates.

Mitigation Strategies

Upgrade Step CA to version 0.29.0 or later, as this version includes the fix for the improper authorization check for SSH certificate revocation affecting deployments using the SSHPOP provisioner.

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