CVE-2026-6832 Nesquena Hermes WebUI Arbitrary File Deletion via Unvalidated session_id
Authenticated attackers can delete arbitrary JSON files on the host system via path traversal in the session_id parameter of the 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-2026-6832?
CVE-2026-6832 is a high-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
Hermes WebUI contains an arbitrary file deletion vulnerability in the /api/session/delete endpoint that allows authenticated attackers to delete files outside the session directory by supplying an absolute path or path traversal payload in the session_id parameter. Attackers can exploit unvalidated session identifiers to construct paths that bypass the SESSION_DIR boundary and delete writable JSON files on the host system.
Weakness: CWE-22
Which versions are affected by CVE-2026-6832?
It affects 1 product.
Products include Get-Hermes Hermes Web Ui.
How do I fix CVE-2026-6832?
No fix has been published for CVE-2026-6832 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-2026-6832 being exploited?
There is no known exploitation of CVE-2026-6832 in the wild and no public exploit code.
Sources
Also known as GHSA-pwfc-qm9r-p6h4.