Cockpit: cockpit: local privilege escalation via insecure symlink handling in public key addition helper
cve-program · CVE-2026-91151
PublishedA 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.
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cve-program · CVE-2026-91151
PublishedCockpit: 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 16:45:02 UTC
- Saved here
- 12 Nov 2026 18:16:18 UTC
- Source terms
- CVE Program Terms of Use
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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