Vulnerability Description
Onyx 4.6.6 fails to properly restrict access to custom tool credentials stored in custom_headers, allowing any authenticated user to read admin-defined API keys. Attackers with basic authentication can call GET /tool/{tool_id} or GET /tool endpoints to retrieve plaintext authorization headers and third-party API credentials, then use them to directly access upstream APIs.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/onyx-dot-app/onyx
- https://github.com/onyx-dot-app/onyx/blob/v4.6.6/backend/onyx/server/features/to
- https://github.com/onyx-dot-app/onyx/blob/v4.6.6/backend/onyx/server/features/to
- https://github.com/onyx-dot-app/onyx/issues/13165
- https://www.vulncheck.com/advisories/onyx-4.6.6-custom-tool-secret-header-disclo
FAQ
What is CVE-2026-85700?
CVE-2026-85700 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Onyx 4.6.6 fails to properly restrict access to custom tool credentials stored in custom_headers, allowing any authenticated user to read admin-defined API keys. Attackers with basic authentication ca...
How severe is CVE-2026-85700?
CVE-2026-85700 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-85700?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.