Information disclosure in Red Hat Certificate System 9
CVE-2026-11873
An Apache-proxied Dogtag CA REST endpoint exposed by IdM (POST /ca/rest/certrequests) returns HTTP 500 with internal Java stack traces for unauthenticated malformed requests. The same unauthenticated error path emits large multi-line stack traces into the CA debug log, creating a log-amplification resource exhaustion vector (disk growth and I/O contention) without requiring authentication.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
Frequently asked questions
- What is CVE-2026-11873?
- CVE-2026-11873 is a medium-severity vulnerability in Red Hat Certificate System 9, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 6.5/10. Published 2026-09-01.
- How severe is CVE-2026-11873?
- Medium severity. CVSS v3 base score is 6.5 out of 10.