VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished CVSS 6.0 mediumEPSS 0.1% probability of exploitation in 30 daysFound by AI: AISLE
Red Hat

CVE-2026-91205: Cockpit-files: cockpit-files: local attacker can hijack file ownership via symlink race

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
0.1%

EPSS score, percentile 1.3 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
6.0 Medium

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (1)

Which versions are affected?

Unaffected 0:36.1-1.el9_8

Versions by product

Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

What to do

Workaround (from the CVE record)

Avoid using the privileged owner-assignment directory-creation flow in Cockpit Files inside directories that are writable by untrusted local users. Restrict write permissions on shared parent directories, and where directories must remain shared and writable, apply the sticky bit so users cannot replace directory entries they do not own. Creating directories without an owner assignment does not trigger the vulnerable privileged chown path and can be used where the owner-setting feature is not required. Updated packages that address this flaw are being delivered for the actively maintained releases.

Advisories and patches

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

Red Hat Red Hat Enterprise Linux 9
StatusVersions
Unaffected0:36.1-1.el9_8

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 10
StatusVersions

Versions not listed are: affected.

Versions the record lists as unaffected: 0:36.1-1.el9_8.

Source: CVE List, as of . About the data.

About this vulnerability

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 arbitrar…

Summary: CVE record, as of .

  • CISA has not added CVE-2026-91205 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
  • The CVE record was published on 18 Sep 2026.
  • The CVE record carries a CVSS v3.1 base score of 6.0 (Medium), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.1% (percentile 1.3), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact total.
  • The credits in the CVE record name AISLE as finder.

Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.

Description

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

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.

Source: CVE List, as of . About the data.

Weakness

CWE-363

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published
CVE record last updated

References

2

Known exploited Red Hat vulnerabilities

  • CVE-2015-3246: Red Hat Libuser Race Condition Vulnerability (added )
  • CVE-2015-5287: Red Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability (added )
  • CVE-2018-14667: Red Hat JBoss RichFaces Framework Expression Language Injection Vulnerability (added )
  • CVE-2021-3560: Red Hat Polkit Incorrect Authorization Vulnerability (added )
  • CVE-2021-4034: Red Hat Polkit Out-of-Bounds Read and Write Vulnerability (added )