CVE-2026-58122: Hermes WebUI < 0.51.307 Authentication Bypass via X-Forwarded-For Header Spoofing
nesquena · hermes-webui
Fixed in 0.51.307 · Affected: nesquena hermes-webui before 0.51.307 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 31% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- nesquena · hermes-webuibefore 0.51.307
On the Atlas
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-58122 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.