TI-2026-80125 Aliases CVE-2026-116004 GHSA-f3f8-mxmv-8237

Cross-site scripting in onyx-dot-app Onyx PreviewTab.tsx

LOW 23CWE-79Published 2026-10-25 · Updated 2026-10-29

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting, Code execution
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79 and CWE-94.

Summary

onyx-dot-app Onyx up to 5.0.0 is affected. A flaw in the PreviewTab.tsx file of the output panel fails to neutralize input, which causes cross-site scripting (CWE-79). A remote attacker with low privileges and user interaction can trigger it. A public exploit has been disclosed and may be used.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A security vulnerability has been detected in onyx-dot-app Onyx up to 5.0.0. Impacted is an unknown function of the file web/src/app/craft/components/output-panel/PreviewTab.tsx. The manipulation leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00199 9th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
onyx-dot-app	Onyx	5.0	—	No fix listed	CNA

Onyx Vendoronyx-dot-app Affected 5.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:onyx:onyx::::::::	—	—	Onyx

cpe:2.3:a:onyx:onyx:*:*:*:*:*:*:*:* Versions — — ·Onyx

Remediation

The sources list no fixed version for Onyx.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

2026-10-25 Threatist record created from CVE-2026-116004
2026-10-27 Alias added: GHSA-f3f8-mxmv-8237
2026-10-29 CISA SSVC decision points changed

References

Other 2

TI-2026-58811 Onyx 4.6.6 Custom Tool Secret Header Disclosure via Tool Endpoints CVSS 4.0HIGH 7.1
TI-2026-45084 Authorization bypass in onyx-dot-app onyx CVSS 3.1MEDIUM 6.5
TI-2026-50048 Onyx: Cross-user OAuth-token leak via /api/mcp/servers* for per-user MCP servers CVSS 3.1CRITICAL 9.6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences