Read the docs
TI-2026-61928 Aliases CVE-2026-91205GHSA-5jj9-v4xp-h5h5

Cockpit-files: cockpit-files: local attacker can hijack file ownership via symlink race

Priority LOW 28CWE-363Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
Required
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

A flaw was found in cockpit-files. A local unprivileged attacker can exploit a race condition during directory creation with owner assignment. By controlling a writable parent directory, the attacker can replace a newly created directory with a symbolic link (symlink) before the ownership change operation (chown) is applied. This allows the attacker to redirect the ownership change to an arbitrary file, potentially leading to information disclosure or unauthorized modification of sensitive files.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00112 1st percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 10—36.1-1.el10_2Patch availableCNA
Red HatRed Hat Enterprise Linux 9—36.1-1.el9_8Patch availableCNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 36.1-1.el10_2 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 36.1-1.el9_8 Patch available CNA

CPE names CNA · 2

CPEVersionsRoleVendor
cpe:/o:redhat:enterprise_linux:10.210.2—Red Hat
cpe:/a:redhat:enterprise_linux:9::appstream9—Red Hat
  • cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2026:95570 Released 2026-11-05 · Red Hat rating Moderate
    cockpit-files security update
    • Red Hat Enterprise Linux AppStream (v. 10) cockpit-files-36.1-1.el10_2
  • RHSA-2026:84595 Released 2026-10-19 · Red Hat rating Moderate
    cockpit-files security update
    • Red Hat Enterprise Linux AppStream (v. 9) cockpit-files-36.1-1.el9_8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 — RHSA-2026:95570

    3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-61926 Cockpit-files: cockpit-files: arbitrary file ownership and permission modification via symlink race conditionPriority MEDIUM 60
    • TI-2026-61925 Cockpit-files: cockpit-files: arbitrary file ownership change via symlink following in privileged pastePriority LOW 26
    Show all 3 records → Advisory →
  • Advisory ·

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 — RHSA-2026:84595

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-61925 Cockpit-files: cockpit-files: arbitrary file ownership change via symlink following in privileged pastePriority LOW 26
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:95570
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:84595

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-91205
  2. 2026-10-03 Alias added: GHSA-5jj9-v4xp-h5h5
  3. 2026-10-19 Fix available: cockpit-files@0:36.1-1.el9_8 · CNA
  4. 2026-10-19 1 new reference · CNA
  5. 2026-10-19 Fix available: RHSA-2026:84595 · Red Hat
  6. 2026-10-19 Fix available: Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  7. 2026-11-06 Fix available: cockpit-files@0:36.1-1.el10_2 · CNA
  8. 2026-11-06 1 new reference · CNA
  9. 2026-11-06 Fix available: RHSA-2026:95570 · Red Hat
  10. 2026-11-06 Fix available: Red Hat Enterprise Linux AppStream (v. 10) · Red Hat

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 7413 →

Sources

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