CVE-2026-71424

criticalpriority · track · 0OT risk · elevatedEPSS 0.005 · 42 %ileEU
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.49% (42nd) EPSS
CVSS 9.6 · critical
Is it mine?
3 products
Check your exposure
Who says so?
1 sources
enisa_euvd

EPSS · scored 2026-10-26

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

9.6
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.8–9.6

v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Nsecondary · ENISA EU
v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 3.1 · impact 5.8
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USCWE-863US
03

affected products (3)

Products and version ranges known to be affected.

04

also known as (1)

Other names and identifiers for this entity.

05

sources

Which sources assert this record, and when.

enisa_euvdNVDCVE.orgMITRE
published 2026-08-17modified 2026-10-22
06

references (16)

External citations — patches, advisories, analysis.

scry

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