CVE-2026-53871

Summary

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.

Affected Software

Weaknesses

• CWE-565: Reliance on Cookies without Validation and Integrity Checking

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• https://github.com/nesquena/hermes-webui/releases/tag/v0.51.368
• https://github.com/nesquena/hermes-webui/pull/4023
• https://github.com/nesquena/hermes-webui/pull/4036
• https://github.com/nesquena/hermes-webui/commit/9e96f5f6adf93b6d1e27ebddfb4d2833ca06ff3b
• https://www.vulncheck.com/advisories/hermes-webui-profile-scoped-authorization-bypass-via-forged-hermes-profile-cookie

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