Vulnerability · Published Oct 25, 2026 · Assigned by VulDB

CVE-2026-116004onyx-dot-app Onyx PreviewTab.tsx cross site scripting

Low 3.5

In plain English

A low-severity cross-site scripting in Onyx from onyx-dot-app. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)3.5Low

Exploit odds (30 days)0.2%top 90.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling1Public PoC

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
onyx-dot-app	Onyx	5.0

Weakness: CWE-79, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C

References

VDB-426102 | onyx-dot-app Onyx PreviewTab.tsx cross site scripting vdb-entry
VDB-426102 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-116004 | CVE Analysis and Report third-party-advisory
Submit #992835 | onyx-dot-app Onyx Craft main commit 711a0479f1630dcce38f8f58212a63080702b753 Same-Origin Iframe Sandbox Bypass / Stored Cross-Site Scripting third-party-advisory
https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-grhq-88h5-2h86 broken-link
https://github.com/onyx-dot-app/onyx/ product