CVE-2026-49973

CriticalCVSS 9.4/10Last modified Oct 26, 2026

Description

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 network origin restriction. Attackers on any reachable network can send a POST request to the settings endpoint during the first-run setup window to persist an arbitrary password hash, obtain a valid session cookie, and lock out the legitimate operator from their own instance.

Metrics

CVSS 3.1 9.4/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Weakness enumeration

CWE-306

Affected software

Vendor	Product	Versions
nesquena	hermes-webui	< 0.51.358

References

Timeline

Published: Jun 11, 2026
Last modified: Oct 26, 2026
NVD status: Deferred

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