CVE-2026-91151
Cockpit: cockpit: local privilege escalation via insecure symlink handling in public key addition helper
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
0th
A 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.
| CWE | CWE-59 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Nov 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat OpenShift Dev Spaces
All versions affected Red Hat / Red Hat OpenShift Dev Spaces
All versions affected Red Hat / Red Hat OpenShift Dev Spaces
All versions affected References
access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-91151 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2478404 github.com: https://github.com/cockpit-project/cockpit/commit/4796b28be064a90e32262cec85be7839e6198e23 github.com: https://github.com/cockpit-project/cockpit/releases/tag/372
Credits
This issue was discovered by Found by AISLE in partnership with Red Hat.