CVE-2026-58122
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.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.3
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- EPSS probability
- 0.37%
- CWE
- CWE-348
- Published
- 2026-07-09
- Last modified
- 2026-07-14
Affected products
- nesquena hermes-webui
Weakness type
Related vulnerabilities
- CVE-2026-16272 — Client IP Spoofing via Untrusted HTTP Headers in PayTR's PayTR Virtual Pos iFrame API (v9x) WHMCS Module
- CVE-2026-16732 — fastify vulnerable to X-Forwarded-* spoofing under trustProxy hop-count
- CVE-2026-25552 — Ghost CLI < 1.30.1 IP Spoofing via X-Forwarded-For Header
- CVE-2026-63220 — CodeIgniter: Spoofable forwarded HTTPS headers in IncomingRequest::isSecure()
- CVE-2026-50243 — 'response-ip'/'rpz' can rewrite BOGUS answers instead of returning SERVFAIL
- CVE-2026-63770 — Glance 0.8.5 IP Spoofing Authentication Brute-Force Protection Bypass
- CVE-2026-64619 — FileCodeBox < 2.4 Anti-bruteforce Rate Limit Bypass via Spoofed Headers
- CVE-2026-46415 — Caddy Defender trusted proxy client IP bypass