CVE-2026-91147CWE-617

CVE-2026-91147

Medium · published September 18, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
33.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00404 · 33.5th percentile
Weakness
CWE-617 · Reachable Assertion
Published
2026-09-18T21:17Z
References (3)
https://access.redhat.com/security/cve/CVE-2026-91147 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2479230 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2479230 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 20 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 18 SEP 16:43Z
    Cockpit: cockpit: denial of service in `cockpit-ws` due to url-root handling without a trailing slash
    cvelistv5