ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-91147

Cockpit: cockpit: denial of service in due to url-root handling without a trailing slash

Published Sep 18, 2026 · catalog updated Nov 4, 2026 · Red Hat Red Hat Enterprise Linux 8

Last checked Nov 7, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-91147. EPSS is 0.64%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 8 is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.64%
Remediation
Advisory link
Affected products
vendor Red Hat Red Hat Enterprise Linux 10 · vendor Red Hat Red Hat Enterprise Linux 7 · vendor Red Hat Red Hat Enterprise Linux 8 · vendor Red Hat Red Hat Enterprise Linux 9 · vendor Red Hat Red Hat OpenShift Dev Spaces

A flaw was found in . This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a specially crafted request. When the is configured and a request is made to the exact URL-root prefix without a trailing slash, can terminate unexpectedly. This issue leads to the unavailability of the Cockpit web service.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Red Hat Red Hat Enterprise Linux 10version unspecified
  • vendor Red Hat Red Hat Enterprise Linux 7version unspecified
  • vendor Red Hat Red Hat Enterprise Linux 8version unspecified
  • vendor Red Hat Red Hat Enterprise Linux 9version unspecified
  • vendor Red Hat Red Hat OpenShift Dev Spacesversion unspecified

How to fix CVE-2026-91147

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-91147. EPSS is 0.64%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 8 is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-617. EPSS 0.64%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 4, 2026 · Tenable CVE Database

    Detected

    A flaw was found in . This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a specially crafted request. When the is configured and a request is made to the exact URL-root prefix without a trailing slash, can terminate unexpectedly. This issue leads to the unavailability of the Cockpit web service.

  2. Nov 4, 2026 · CVE.org

    Updated

    A flaw was found in . This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a specially crafted request. When the is configured and a request is made to the exact URL-root prefix without a trailing slash, can terminate unexpectedly. This issue leads to the unavailability of the Cockpit web service.

Sources

  • CVE.orgVulnerability recordCVE-2026-91147

    A flaw was found in . This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a specially crafted request. When the is configured and a request is made to the exact URL-root prefix without a trailing slash, can terminate unexpect

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-91147

    30-day exploitation probability 0.64%

    first.org
  • Tenable CVE DatabaseVulnerability recordCVE-2026-91147

    A flaw was found in . This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a specially crafted request. When the is configured and a request is made to the exact URL-root prefix without a trailing slash, can terminate unexpectedly. This issue leads to the unavailability of the Cockpit web service.

    tenable.com

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Tenable CVE DatabaseNov 7, 2026
  • FIRST EPSSNov 5, 2026
  • CVE.orgNov 5, 2026