Vulnerability in Red Hat Enterprise Linux 10
CVE-2026-91147
A flaw was found in `cockpit-ws`. This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a specially crafted request. When the `WebService.UrlRoot` is configured and a request is made to the exact URL-root prefix without a trailing slash, `cockpit-ws` can terminate unexpectedly. This issue leads to the unavailability of the Cockpit web service.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
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-2026-91147?
- CVE-2026-91147 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Reachable Assertion. CVSS score: 5.9/10. Published 2026-09-18.
- How severe is CVE-2026-91147?
- Medium severity. CVSS v3 base score is 5.9 out of 10.