CVE-2026-53871highCWE-565

CVE-2026-53871: high-severity vulnerability in nesquena hermes-webui

Hermes WebUI < 0.51.368 - Profile-Scoped Authorization Bypass via Forged hermes_profile Cookie

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.6epss 0.4%
Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the get_profile_cookie() function that accepts unauthenticated profile names from the hermes_profile cookie. An authenticated attacker can forge the hermes_profile cookie value to bypass profile-scoped authorization checks and access sessions, files, and resources across different profiles.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
nesquena · hermes-webui
Related CVEs — nesquena hermes-webui

In the same product, most dangerous first.

CVE-2026-58123CRITICALHermes WebUI < 0.51.788 Unauthenticated RCE via Terminal APIEPSS 4.6%CVE-2026-49959HIGHHermes WebUI < 0.51.311 RCE via Git Configuration InjectionEPSS 0.9%CVE-2026-49955MEDIUMHermes WebUI < 0.51.270 Resource Exhaustion via passkey/optionsEPSS 0.6%CVE-2026-49973CRITICALHermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settingsEPSS 0.5%CVE-2026-55205MEDIUMHermes WebUI < 0.51.468 - Resource Exhaustion via Unauthenticated OAuth Flow EndpointEPSS 0.5%CVE-2026-6832HIGHNesquena Hermes WebUI Arbitrary File Deletion via Unvalidated session_idEPSS 0.5%