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TI-2026-61908 Aliases CVE-2026-91147GHSA-cj5v-4j3m-m6j5

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

Priority MEDIUM 60CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 3 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-617.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00641 50th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 3 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 8—310.10-1.el8_10Patch availableCNA
Red HatRed Hat Enterprise Linux 9—356.4-1.el9_8Patch availableCNA
Red HatRed Hat Enterprise Linux 9—356.4-1.el9_8Patch availableCNA
Red HatRed Hat Enterprise Linux 10——No fix listedCNA
Red HatRed Hat Enterprise Linux 7——No fix listedCNA
Red HatRed Hat OpenShift Dev Spaces——No fix listedCNA
Red HatRed Hat OpenShift Dev Spaces——No fix listedCNA
Red HatRed Hat OpenShift Dev Spaces——No fix listedCNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 310.10-1.el8_10 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 356.4-1.el9_8 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 356.4-1.el9_8 Patch available CNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Dev Spaces VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Dev Spaces VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Dev Spaces VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE names CNA · 6

CPEVersionsRoleVendor
cpe:/o:redhat:enterprise_linux:8::baseos8—Red Hat
cpe:/a:redhat:enterprise_linux:9::appstream9—Red Hat
cpe:/o:redhat:enterprise_linux:9::baseos9—Red Hat
cpe:/a:redhat:enterprise_linux:1010—Red Hat
cpe:/o:redhat:rhel_els:77—Red Hat
cpe:/a:redhat:openshift_devspaces:33—Red Hat
  • cpe:/o:redhat:enterprise_linux:8::baseos Versions 8 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
  • cpe:/o:redhat:enterprise_linux:9::baseos Versions 9 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:10 Versions 10 — ·Red Hat
  • cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
  • cpe:/a:redhat:openshift_devspaces:3 Versions 3 — ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2026:94533 Released 2026-11-03 · Red Hat rating Important
    cockpit security update
    • Red Hat Enterprise Linux AppStream (v. 9) cockpit-packagekit-356.4-1.el9_8, cockpit-storaged-356.4-1.el9_8
    • Red Hat Enterprise Linux BaseOS (v. 9) cockpit-356.4-1.el9_8, cockpit-bridge-356.4-1.el9_8, cockpit-doc-356.4-1.el9_8 +3
  • RHSA-2026:94485 Released 2026-11-03 · Red Hat rating Moderate
    cockpit security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) cockpit-310.10-1.el8_10, cockpit-bridge-310.10-1.el8_10, cockpit-doc-310.10-1.el8_10 +2

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat OpenShift Dev SpacesAffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:94533
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:94485
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:94533

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-91147
  2. 2026-10-03 Alias added: GHSA-cj5v-4j3m-m6j5
  3. 2026-11-03 Fix available: cockpit@0:310.10-1.el8_10 · CNA
  4. 2026-11-03 1 new reference · CNA
  5. 2026-11-03 Fix available: RHSA-2026:94485 · Red Hat
  6. 2026-11-03 Fix available: Red Hat Enterprise Linux BaseOS (v. 8) · Red Hat
  7. 2026-11-04 Fix available: cockpit@0:356.4-1.el9_8 · CNA
  8. 2026-11-04 1 new reference · CNA
  9. 2026-11-04 Fix available: RHSA-2026:94533 · Red Hat
  10. 2026-11-04 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9) · Red Hat
  11. 2026-11-05 EPSS moved to the 50th–90th percentile

References

Advisory 2

Other 2

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7412 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences