CVE WatchJul 14, 2026

CVE-2026-58122

Hermes WebUI before 0.51.307 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to circumvent loca

CVSS

9.1

Critical

EPSS

0.4%

p31

KEV

—

Exploit Today

0-100

Published: Jul 9, 2026 · Last modified: Jul 14, 2026 · CWE-348

EPSS · 30d

0.3%EPSS · 30 days0.4%

2026-08-222026-09-19

Technical 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.

Official references

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