CVE-2026-58122 — Hermes WebUI < 0.51.307 Authentication Bypass via X-Forwarded-For Header Spoofing
Hermes WebUI before 0.51.307 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to circumvent local-origin IP restrictions on onboardin…
Published: 2026-07-09 · CVSS: 9.3 · CVSS 4.0
Hermes WebUI before 0.51.307 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to circumvent local-origin IP restrictions on onboarding endpoints by supplying a spoofed X-Forwarded-For header with a loopback address. Attackers can exploit this bypass to perform server-side request forgery against internal services including cloud metadata endpoints, overwrite LLM provider configuration and API keys with attacker-controlled values, or initiate OAuth device-code flows to obtain persistent access tokens stored in auth.json.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7