CVE-2026-6829 nesquena hermes-webui Arbitrary Workspace Directory Access
Authenticated attackers can manipulate workspace paths to read or modify files outside the intended directory boundary in hermes-webui.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6829?
CVE-2026-6829 is a medium-severity path traversal vulnerability in nesquena hermes-webui, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
nesquena hermes-webui contains a trust-boundary failure vulnerability that allows authenticated attackers to set or change a session workspace to an arbitrary existing directory on disk by manipulating workspace path parameters in endpoints such as /api/session/new, /api/session/update, /api/chat/start, and /api/workspaces/add. Attackers can repoint a session workspace to a directory outside the intended trusted root and then use ordinary file read and write APIs to access or modify files outside the intended workspace boundary within the permissions of the hermes-webui process.
Weakness: CWE-22
Which versions are affected by CVE-2026-6829?
How do I fix CVE-2026-6829?
No fix has been published for CVE-2026-6829 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-6829 being exploited?
There is no known exploitation of CVE-2026-6829 in the wild and no public exploit code.
Sources
Also known as GHSA-rppv-5944-crmm.