Vulnerability Description
TypeBot is a chatbot builder tool. Versions 3.15.2 and prior contain a critical stored XSS vulnerability in the app.typebot.io profile picture upload form. The application fails to sanitize or restrict SVG/XML-based uploads and directly renders them when accessed through the domain. By uploading a crafted malicious SVG file containing embedded JavaScript, an attacker will execute arbitrary JavaScript code. This vulnerability directly enables stored XSS exploitation because the payload is persistently stored on your infrastructure (app.typebot.io) and accessible from a public-facing, permanent link. Stored XSS via malicious SVG uploads to app.typebot.io allows attackers to execute arbitrary JavaScript in victims' browsers, enabling session/token theft, account takeover, and exfiltration of sensitive user data. This issue has been fixed in version 3.16.0.
Related Weaknesses (CWE)
References
- https://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0
- https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-jj87-c343-26
- https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-jj87-c343-26
FAQ
What is CVE-2026-39970?
CVE-2026-39970 is a documented vulnerability. TypeBot is a chatbot builder tool. Versions 3.15.2 and prior contain a critical stored XSS vulnerability in the app.typebot.io profile picture upload form. The application fails to sanitize or restric...
How severe is CVE-2026-39970?
CVSS scoring is not yet available for CVE-2026-39970. Check NVD for updates.
Is there a patch for CVE-2026-39970?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.