CVE-2026-58122Critical· 9.1▾ MidnightHermes 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 wi…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 50.1 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
0.3% → 0.4%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-118265Medium· 5.3Echo: X-Real-IP extractor trusts the header value instead of the sending peer
GHSA-h53f-rm2w-w7rgMedium· 5.3Echo: X-Real-IP extractor trusts the header value instead of the sending peer
GHSA-7cgw-qmxx-7fc2Medium· 4.8Duplicate Advisory: chi: Client IP spoofing in ClientIPFromXFF via X-Forwarded-For
CVE-2026-112378Medium· 4.3Use of Less Trusted Source in GitLab
CVE-2026-114474Medium· 5.9Use of Less Trusted Source in hMailServer
CVE-2026-114437Medium· 4.8chi: Client IP spoofing in ClientIPFromXFF via X-Forwarded-For