Auth bypass in Nesquena Hermes-webui
CVE-2026-55198
Hermes WebUI before 0.51.443 contains an authorization bypass vulnerability in the session export endpoint that allows authenticated users to access sessions from other profiles. The _handle_session_export handler in api/routes.py fails to…
Vulnerability class: IDOR (Insecure Direct Object Reference)
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Nesquena Hermes-webui — versions 0, 0.51.443
Weakness classification (CWE)
References
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-55198?
- CVE-2026-55198 is a medium-severity vulnerability in Nesquena Hermes-webui, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-06-17.
- How severe is CVE-2026-55198?
- Medium severity. CVSS v3 base score is 6.5 out of 10.