CVE-2026-25826
Exposure of Sensitive Information to an Unauthorized Actor
Issue summary
The attribute ATTRIBUTESFILE in PKCS11CryptoToken can be set to a readable file but not an accepted file (i.e recognized with attributes). In this case an error is thrown which together with the error also print the content of the file to the application server log. This vulnerability gives a user that has both SignServer admin access and access to read the output of the server log (i.e. if remote syslog shipping is configured), the possibility to read the content in files accessible by the local user JBoss.
Severity
Keyfactor rates the severity as medium with a CVSS score of CVSS 4.6. Assigned CVE-2026-25826.
Who is affected?
All SignServer users prior to 7.6.0.
Risk assessment
An authorized Admin can access the content of any file on the server accessible by local user JBoss.
Mitigation
Upgrade to SignServer 7.6.0 or later.
Additional information
Should you have any additional questions, please reach out to support@keyfactor.com.
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