CVE-2026-91147

CVSS 5.9 (medium) · published 2026-09-18

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.

Weakness: CWE-617

Source: NVD CVE-2026-91147

References

• https://access.redhat.com/errata/RHSA-2026:94485
• https://access.redhat.com/errata/RHSA-2026:94533
• https://access.redhat.com/errata/RHSA-2026:96250
• https://access.redhat.com/errata/RHSA-2026:98463
• https://access.redhat.com/errata/RHSA-2026:98567
• https://access.redhat.com/security/cve/CVE-2026-91147
• https://bugzilla.redhat.com/show_bug.cgi?id=2479230
• https://bugzilla.redhat.com/show_bug.cgi?id=2479230

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