Logic Error in Keyfactor SignServer Container Startup Affects Access Control
CVE-2025-26787

4.7MEDIUM

Key Information:

Vendor

Keyfactor

Status
SignServer
Vendor
CVE Published:
22 December 2025

What is CVE-2025-26787?

A logic error in the Keyfactor SignServer's container startup process allows for inadequate certificate access control. Specifically, prior to version 7.2, the Admin CLI command intended to configure certificate access was mistakenly executed at every container restart, rather than just on the initial startup. This flaw resets the access configuration to 'allowany', permitting any user with a valid client authentication certificate to gain access. Although administrators can then impose stricter restrictions, this misconfiguration exposes the system to potential unauthorized access at every restart.

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References

https://support.keyfactor.com/hc/en-us/articles/339977067...
https://docs.keyfactor.com/signserver/latest/signserver-7...

CVSS V3.1

Score:
4.7
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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