CVE-2026-58122 | Hermes WebUI before 0.51.307 contains an authentication bypa… | CVSS 9.1 CRITICAL

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.

Metadata

CVE ID: CVE-2026-58122
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-29 14:13 UTC
Published: 2026-07-09 21:30 UTC
Last updated: 2026-07-09 21:30 UTC
Primary CWE: CWE-348
Use of Less Trusted Source
Vendor / Product: nesquena / hermes-webui
Sources: cve.org · NVD

Severity & Metrics

9.1 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products (1)

Vendor	Product	Platform	Versions
nesquena	hermes-webui	—	0 < 0.51.307

Weakness (CWE)

CWE	Source	Description
CWE-348	cna	Use of Less Trusted Source

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.3	CRITICAL	4.0	cna	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
9.1	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References (4)