CVE-2026-49973
Critical · 9.4CVSS
9.4
EPSS
0.7%
Published
Jun 11, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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