CVE-2026-85700

    Dashboard / Vulnerabilities / CVE-2026-85700

    CVE-2026-85700

    Published: 4 Sept 2026Last Modified: 25 Sept 2026

    Summary: Onyx 4.6.6 Custom Tool Secret Header Disclosure via Tool Endpoints

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85700.json, https://nvd.nist.gov/vuln/detail/CVE-2026-85700, https://www.vulncheck.com/advisories/onyx-4.6.6-custom-tool-secret-header-disclosure-via-tool-endpoints, https://github.com/onyx-dot-app/onyx/issues/13165, https://github.com/onyx-dot-app/onyx, https://github.com/onyx-dot-app/onyx/blob/v4.6.6/backend/onyx/server/features/tool/api.py, https://github.com/onyx-dot-app/onyx/blob/v4.6.6/backend/onyx/server/features/tool/models.py

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    v4.6.6
    v4.6.5
    v4.6.4
    v4.6.3
    v4.6.2
    v4.6.1
    v4.6.0
    v4.6.0-beta.1
    v4.6.0-beta.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-85700 | CVE-DB