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VulnerabilityCVE-2026-71424Published 2026-08-17

CVE-2026-71424 — onyx-dot-app onyx

critical

As of 2026-08-17, CVE-2026-71424 is a CRITICAL-severity vulnerability in onyx-dot-app onyx, CVSS v3.1 9.6. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-71424 as of 2026-08-17; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

CVSS v3.1
9.6/10Critical
EPSS
—No EPSS score yet
CISA KEV
NoNot in the KEV catalog
Tracked threats
0None linked yet
Priority
4.8/10Threadlinqs triage score
Published
CVSS v3.1 9.6 (CRITICAL) · Priority 4.8/10 · Published 2026-08-17

Last updated:

What is CVE-2026-71424?

Onyx is an open-source AI platform. Prior to 3.1.10, 3.2.14, and 4.0.0, Onyx's GET /api/mcp/servers and GET /api/mcp/servers/persona/{persona_id} endpoints expose another user's OAuth Authorization header because OnyxTokenStorage.set_tokens and OnyxTokenStorage.set_client_info in backend/onyx/server/features/mcp/api.py copy per-user tokens into a shared admin MCPConnectionConfig row and _db_mcp_server_to_api_mcp_server returns that row through auth_template.headers to any BASIC_ACCESS user. This issue is fixed in versions 3.1.10, 3.2.14, and 4.0.0.

The record classifies CVE-2026-71424 under weakness classes CWE-200, CWE-863. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 49 days ago.

Severity and exploitation probability

CVSS v3.1 base score
9.6 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
4.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-08-17

Is CVE-2026-71424 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

Affected products and versions

  • onyx-dot-app: onyx

How to fix CVE-2026-71424

No vendor patch reference has been recorded for CVE-2026-71424 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-71424

No threat campaign in the Threadlinqs corpus currently references CVE-2026-71424, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

Sources

Enriched from CVE.org, NVD. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch

Other references

Showing 6 of 8 recorded references.