What is CVE-2026-49973?

CVE-2026-49973 is a critical-severity vulnerability in Nesquena Hermes-webui, classified under Missing Authentication for Critical Function. CVSS score: 9.4/10. Published 2026-06-11.

How severe is CVE-2026-49973?

Critical severity. CVSS v3 base score is 9.4 out of 10.

Auth bypass in Nesquena Hermes-webui

CVE-2026-49973

Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the _set_password parameter to the settings API endpoint without any…

Vulnerability class: Broken Authentication

EPSS: 0.005 (42.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

Affected products

Nesquena Hermes-webui — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-49973?: CVE-2026-49973 is a critical-severity vulnerability in Nesquena Hermes-webui, classified under Missing Authentication for Critical Function. CVSS score: 9.4/10. Published 2026-06-11.
How severe is CVE-2026-49973?: Critical severity. CVSS v3 base score is 9.4 out of 10.