Cockpit: cockpit: local privilege escalation via insecure symlink handling in public key addition helper

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-91151
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-11 20:17:10 UTC
Updated2026-11-12 12:18:26 UTC
DescriptionA flaw was found in Cockpit. A local authenticated user with control over a target account's home directory can exploit a privileged symlink dereference vulnerability in the `ssh-add-public-key.sh` helper. When this helper runs with elevated privileges, it can be tricked into following attacker-controlled symlinks within the `.ssh` or `authorized_keys` paths. This allows the attacker to arbitrarily change file ownership and modes, potentially leading to local privilege escalation and impacting the integrity, confidentiality, and availability of the system.

Risk And Classification

Primary CVSS: v3.1 7.3 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Problem Types: CWE-59 | CWE-59 Improper Link Resolution Before File Access

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.3HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
3.1CNACVSS7.3HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 10 unaffected 0:366.1.1-1.el10_3 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:310.10.2-1.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
CNA Red Hat Red Hat OpenShift Dev Spaces Not specified Not specified
CNA Red Hat Red Hat OpenShift Dev Spaces Not specified Not specified
CNA Red Hat Red Hat OpenShift Dev Spaces Not specified Not specified

References

ReferenceSourceLinkTags
github.com/cockpit-project/cockpit/commit/4796b28be064a90e32262cec85be78... [email protected] github.com
access.redhat.com/security/cve/CVE-2026-91151 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:99600 [email protected] access.redhat.com
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
github.com/cockpit-project/cockpit/releases/tag/372 [email protected] github.com
access.redhat.com/errata/RHSA-2026:99603 [email protected] access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: This issue was discovered by Found by AISLE in partnership with Red Hat. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-18T03:32:25.000ZReported to Red Hat.
CNA2026-11-10T23:59:00.000ZMade public.

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