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

CVSS 3.1 7.3 HIGHCheck source for fixed versionsKEV status unknown

Historical advisory recorded 12 Nov 2026 14:16:18 UTC. Read the latest advisory.

cve-program · CVE-2026-91151

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-91151

Published

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

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.

Source published
11 Nov 2026 19:46:14 UTC
Source modified
12 Nov 2026 12:53:27 UTC
Saved here
12 Nov 2026 14:16:18 UTC
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CVSS 3.1 · 7.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

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Sources read 12 Nov 18:36 UTC · 273 of 275 readable · 271 fully read · documentation 469/469 current