CVE-2026-91147

Summary

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.

Affected Software

Weaknesses

• CWE-617: Reachable Assertion

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://bugzilla.redhat.com/show_bug.cgi?id=2479230

References

• https://access.redhat.com/security/cve/CVE-2026-91147
• https://bugzilla.redhat.com/show_bug.cgi?id=2479230

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