CVE-2026-24399ChatterMate has Stored Cross-Site Scripting (XSS) via Chatbot Input Execution
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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ChatterMate is a no-code AI chatbot agent framework. In versions 1.0.8 and below, the chatbot accepts and executes malicious HTML/JavaScript payloads when supplied as chat input. Specifically, an <iframe> payload containing a javascript: URI can be processed and executed in the browser context. This allows access to sensitive client-side data such as localStorage tokens and cookies, resulting in client-side injection. This issue has been fixed in version 1.0.9.
- CVSS
- 9.3 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Jan 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
chattermate chattermate.chat chattermate:chattermate.chat (from the name) | before 1.0.9 | CNA record |
chattermate chattermate chattermate:chattermate | before 1.0.9 | NVD |
References
- https://github.com/chattermate/chattermate.chat/security/advisories/GHSA-72p3-w95w-q3j4x-refsource-confirm, exploit, vendor-advisory
- https://github.com/chattermate/chattermate.chat/commit/ff3398031abb97ae28546eaf993fed3619eaffddx-refsource-misc, patch
- https://github.com/chattermate/chattermate.chat/releases/tag/v1.0.9x-refsource-misc, product, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.