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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.

PUBLISHED Reserved 2026-04-21 | Published 2026-04-21 | Updated 2026-04-22 | Assigner VulnCheck




HIGH: 7.2CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

HIGH: 8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Problem types

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

Default status
unaffected

Any version before PR #409
affected

Credits

Chia Min Jun Lennon finder

References

github.com/nesquena/hermes-webui/pull/409 (Pull Request) patch

github.com/nesquena/hermes-webui/pull/412 (Pull Request)

github.com/...ommit/3cc5839bf303fa6758bfdac538507407a2929655 (Patch Commit)

github.com/nesquena/hermes-webui/releases/tag/v0.50.132 (Release Notes) third-party-advisory

github.com/nesquena/hermes-webui/releases/tag/v0.50.32 (Release Notes) third-party-advisory

www.vulncheck.com/...ile-deletion-via-unvalidated-session-id third-party-advisory

cve.org (CVE-2026-6832)

nvd.nist.gov (CVE-2026-6832)

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