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Hermes Webui CVE-2026-6830

| EUVDEUVD-2026-24515 MEDIUM
Exposure of Resource to Wrong Sphere (CWE-668)
2026-04-21 VulnCheck GHSA-vvfr-g83f-8qcv
Information Disclosure Hermes Webui
4.8
CVSS 4.0 · NVD
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Severity by source

NVD PRIMARY
4.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/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
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

5
Severity Changed
Apr 21, 2026 - 22:22 NVD
LOW MEDIUM
CVSS changed
Apr 21, 2026 - 22:22 NVD
3.3 (LOW) 4.8 (MEDIUM)
EUVD ID Assigned
Apr 21, 2026 - 22:16 euvd
EUVD-2026-24515
Patch released
Apr 21, 2026 - 22:16 nvd
Patch available
CVE Published
Apr 21, 2026 - 21:33 nvd
MEDIUM 4.8

DescriptionCVE.org

nesquena hermes-webui contains an environment variable leakage vulnerability where profile switching does not clear environment variables from the previously active profile before loading the next profile. Attackers or users can exploit additive dotenv reload behavior to access provider API keys and other sensitive secrets from one profile context in another profile, breaking expected security isolation between profiles.

Analysis

nesquena hermes-webui contains an environment variable leakage vulnerability where profile switching does not clear environment variables from the previously active profile before loading the next profile. Attackers or users can exploit additive dotenv reload behavior to access provider API keys and other sensitive secrets from one profile context in another profile, breaking expected security isolation between profiles.

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Cross-profile data disclosure in Hermes WebUI before 0.51.269 allows authenticated users to read session titles and tran
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Cross-profile session data exfiltration in Hermes WebUI before 0.51.443 lets any authenticated user retrieve session tra
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Cross-profile session disclosure in Hermes WebUI before 0.51.443 lets any authenticated user retrieve conversation trans
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Resource exhaustion in Hermes WebUI before v0.51.270 allows unauthenticated remote attackers to degrade service availabi
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Resource exhaustion in Hermes WebUI before 0.51.468 exposes an unauthenticated POST /api/onboarding/oauth/start endpoint

Same weakness CWE-668 – Exposure of Resource to Wrong Sphere

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Same technique Information Disclosure

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CVE-2026-6830 vulnerability details – vuln.today
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