PT-2026-42822 · Typebot · Typebot

CVE-2026-39970 · Published 2026-05-22 · Updated 2026-05-23

Positive Technologies (AI Summary)

CVSS v4.0

8.5

High

Base vector

AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions TypeBot versions prior to 3.16.0

Description The application contains a stored Cross-Site Scripting (XSS) issue in the profile picture upload form at the 'app.typebot.io' endpoint. The system fails to sanitize or restrict SVG/XML-based uploads and renders them directly. An attacker can upload a crafted SVG file containing embedded JavaScript to execute arbitrary code in the browsers of victims. Because the payload is persistently stored on the infrastructure and accessible via a permanent public link, this can lead to session or token theft, account takeover, and exfiltration of sensitive user data.

Recommendations Update to version 3.16.0.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-39970

GHSA-JJ87-C343-26VP

Affected Products

Typebot

References · 6

• 🔥 https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-jj87-c343-26vp · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39970.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-39970 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-39970 · Security Note
• https://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0 · Note
• https://twitter.com/vuldb/status/2058283365074407644 · Twitter Post