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CVE

CVE-2026-58122

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

CVE-2026-58122

Hermes WebUI < 0.51.307 Authentication Bypass via X-Forwarded-For Header Spoofing

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58122.json, https://github.com/nesquena/hermes-webui/releases/tag/v0.51.307, https://nvd.nist.gov/vuln/detail/CVE-2026-58122, https://www.vulncheck.com/advisories/hermes-webui-authentication-bypass-via-x-forwarded-for-header-spoofing, https://github.com/nesquena/hermes-webui/pull/3758, https://github.com/nesquena/hermes-webui/commit/70596e6993be0d4cee083c1c1a86f5e7ad5d57b7, https://github.com/nesquena/hermes-webui

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00373%
EPSS Percentile
0.30008%
Introduced Version
0
Fix Available
70596e6993be0d4cee083c1c1a86f5e7ad5d57b7

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