CVE-2026-85700
Onyx 4.6.6 Custom Tool Secret Header Disclosure via Tool Endpoints
- State
- Published
- Severity
- 7.1 High
- Published
- Sep 4, 2026
- Updated
- Sep 4, 2026
- Reserved
- Sep 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-522 Insufficiently Protected Credentials
Affected Products
| Product | Versions |
|---|---|
onyxonyx-dot-app |
|
References
- GitHub Issue #13165issue-tracking
- https://github.com/onyx-dot-app/onyxproduct
- https://github.com/onyx-dot-app/onyx/blob/v4.6.6/backend/onyx/server/features/tool/models.pytechnical-description
- https://github.com/onyx-dot-app/onyx/blob/v4.6.6/backend/onyx/server/features/tool/api.pytechnical-description
- VulnCheck Advisory: Onyx 4.6.6 Custom Tool Secret Header Disclosure via Tool Endpointsthird-party-advisory
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