CVE-2026-11322 Hermes WebUI before 0.51.221 Path Traversal via Symlink Workspace Bypass
Attackers can read sensitive host files like SSH keys by exploiting symlink handling in Hermes WebUI workspace APIs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-11322?
CVE-2026-11322 is a high-severity path traversal vulnerability in nesquena Hermes WebUI, published on 4 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Hermes WebUI prior to v0.51.221 contains a path traversal vulnerability that allows attackers to escape the workspace boundary by supplying symlinks that resolve to files or directories outside the designated workspace root. Attackers can exploit the workspace file and listing APIs, which resolve symlink targets without enforcing that the final path remains within the workspace, to read external host files accessible to the server process and disclose sensitive data such as SSH keys, cloud credentials, or application tokens.
Weakness: CWE-59
Which versions are affected by CVE-2026-11322?
How do I fix CVE-2026-11322?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-11322 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11322 exists.
Sources
Also known as GHSA-wp87-gw3h-3hx6.