CVE-2026-6832
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 7.2 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.47% probability · 40th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- get-hermes/hermes web ui
- Source
- disclosure@vulncheck.com
References
- https://github.com/nesquena/hermes-webui/commit/3cc5839bf303fa6758bfdac538507407a2929655Patch
- https://github.com/nesquena/hermes-webui/pull/409Exploit, Issue Tracking, Patch, Vendor Advisory
- https://github.com/nesquena/hermes-webui/pull/412Issue Tracking, Patch
- https://github.com/nesquena/hermes-webui/releases/tag/v0.50.132Product, Release Notes
- https://github.com/nesquena/hermes-webui/releases/tag/v0.50.32Product, Release Notes
- https://www.vulncheck.com/advisories/nesquena-hermes-webui-arbitrary-file-deletion-via-unvalidated-session-idThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.