CVE-2026-58122 – Hermes WebUI < 0.51.307 Authentication Bypass via X-Forwarded-For Header Spoofing

CVE ID :CVE-2026-58122

Published : July 9, 2026, 9:30 p.m. | 18 minutes ago

Description :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.

Severity: 9.3 | CRITICAL

Visit the link for more details, such as CVSS details, affected products, timeline, and more…