CVE-2026-91147
Medium
Description
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.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Enterprise Linux 8
PublishedSep 18, 2026
First seenSep 18, 2026
Weakness typeCWE-617CWE-617
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| enterprise_linux 8 | No range specified | — |
| enterprise_linux 9 | No range specified | — |
| Red Hat Red Hat Enterprise Linux 10 | No range specified | — |
| Red Hat Red Hat Enterprise Linux 7 | No range specified | — |
| Red Hat Red Hat OpenShift Dev Spaces | No range specified | — |
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