CVE-2026-28445: baptisteArno Typebot stored XSS in RatingButton component

CVE-2026-28445 · Severity: high · CVSS 8.7 · Published 2026-05-22

Typebot is an open-source chatbot builder. A security vulnerability in the chatbot editor allows a malicious user or collaborator to create a chatbot that executes unauthorized code when viewed by an administrator or editor. This could lead to an attacker stealing login sessions, accessing sensitive workspace data, or escalating their privileges within the platform. The issue specifically affects the 'Rating' button component when a custom icon is used.

Technologies: @typebot.io/js (npm). Vendors: npm.

Quick answers

Is CVE-2026-28445 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-28445 being exploited in the wild.
How severe is CVE-2026-28445?
High severity, with a CVSS score of 8.7, published 22 May 2026.
Which products and versions are affected?
@typebot.io/js (npm) < 0.10.1, SEMVER:introduced=0,fixed=0.10.1.
Is there a fix for CVE-2026-28445?
Yes. @typebot.io/js (npm): upgrade to 0.10.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-28445 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-28445?
Check whether you run @typebot.io/js (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • @typebot.io/js (npm): upgrade to 0.10.1 or later
    npm install @typebot.io/js@0.10.1

Technical details

A stored Cross-Site Scripting (XSS) vulnerability exists in Typebot's RatingButton component due to the unsanitized use of Solid's innerHTML directive on the 'customIcon.svg' field. While Typebot employs a Web Worker sandbox to isolate untrusted scripts during bot previews, the Rating block was not included in the 'isUnsafe' sanitization list. Consequently, a malicious SVG payload (e.g., using 'onerror' handlers) executes directly in the builder's DOM context on the 'builder.typebot.io' origin. Because the builder's Content Security Policy (CSP) permits 'unsafe-inline', an attacker can bypass the sandbox to hijack session cookies or perform actions on behalf of an authenticated user. This is fixed in version 3.16.0 by implementing proper SVG sanitization.

Affected products

  • baptisteArno typebot.io <= 3.15.2

Identifiers

  • CVE-2026-28445
  • GHSA-6m7c-xfhp-p9fh

Timeline

  • 2026-04-08: patched: Version 3.16.0 released
  • 2026-05-22: disclosed: Security advisory published

References

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