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.
Published: 2026-10-27
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
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Remediation

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Tracking

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Advisories

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References
History

Wed, 04 Nov 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 27 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Nextchat
Nextchat nextchat
Vendors & Products Nextchat
Nextchat nextchat

Tue, 27 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Tue, 27 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
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.
Title CVE-2026-118132
References

Subscriptions

Nextchat Nextchat
cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-11-04T17:00:53.282Z

Reserved: 2026-10-27T17:35:26.020Z

Link: CVE-2026-118132

cve-icon Vulnrichment

Updated: 2026-11-04T17:00:48.231Z

cve-icon NVD

Status : Deferred

Published: 2026-10-27T18:17:36.807

Modified: 2026-11-04T17:17:32.540

Link: CVE-2026-118132

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-04T19:00:16Z

Weaknesses