CVE-2026-118132 Details
Description
NextChat version 2.16.1 contains a client‑side cross‑site scripting (XSS) vulnerability in the Plugin Editor due to unsafe rendering of externally supplied OpenAPI plugin schema content. When a plugin schema is loaded from a remote URL, the returned content is stored in plugin.content and later rendered using React’s dangerouslySetInnerHTML without proper sanitization. An attacker can host a malicious OpenAPI schema containing HTML or JavaScript markup and trick a user into loading it through the Plugin Editor, resulting in arbitrary JavaScript execution in the NextChat origin. Successful exploitation allows access to JavaScript‑readable cookies and other client‑side data associated with the NextChat application.
A cross-site scripting (XSS) vulnerability has been identified in NextChat version 2.16.1. This issue arises in the Plugin Editor, where externally supplied OpenAPI plugin schema content is rendered unsafely. When a plugin schema is fetched from a remote URL, the content is stored in 'plugin.content' and later displayed using React's 'dangerouslySetInnerHTML' without adequate sanitization. This allows an attacker to host a malicious OpenAPI schema containing HTML or JavaScript and deceive a user into loading it via the Plugin Editor. The exploitation leads to arbitrary execution of JavaScript in the NextChat origin, with potential access to JavaScript-readable cookies and other client-side data associated with the NextChat application.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 27, 2026CISA-ADP
Assessed Nov 4, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/ChatGPTNextWeb/NextChat | [email protected] | ProductSource CodeVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| NextChat | 2.16.1 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 4, 2026 | CVE Modified | CISA-ADP |
| Oct 27, 2026 | New CVE Received | [email protected] |