Answer in brief
CVE-2026-85700 records a High severity (CVSS 6.5) vulnerability in Onyx 4.6.6 Custom Tool Secret Header Disclosure via Tool Endpoints. The current sources do not mark it as known exploited. The current feed maps onyx-dot-app/onyx (generic), onyx-dot-app/onyx (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps onyx-dot-app/onyx (generic), onyx-dot-app/onyx (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| onyx-dot-app/onyxgeneric | 0 | Not reported |
| onyx-dot-app/onyxgeneric | >=0 <=4.6.6 | Not reported |
Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.