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CVE-2026-118129EUVD-2026-111475GHSA-4RHF-9GX6-4PQP

jeremyckahn Chitchatter PostMessage Bootstrap.tsx isConfigMessageEvent improper authentication

Published
Last modified
published
Not listed in CISA KEV
Fix
Fix or patch referenced
None on Exploit-DB, Metasploit or GitHub

Summary

The Chitchatter web chat application, specifically its PostMessage handling code in the Bootstrap component, is affected. Improper authentication of messages received through this handler could allow an attacker to bypass its origin checks and have the application accept forged configuration messages remotely.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Read the original description

A vulnerability was found in jeremyckahn Chitchatter up to f82538633813c854a81a8b2112a2f6ba17b39cbc. The affected element is the function isConfigMessageEvent of the file src/Bootstrap.tsx of the component PostMessage Handler. Performing a manipulation of the argument parentDomain results in improper authentication. Remote exploitation of the attack is possible. The exploit has been made public and could be used. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The patch is named e3babb5cd83bfe3b99f1d82358ac5c1ea8e8a688. It is recommended to apply a patch to fix this issue. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Timeline

  1. CVE published
  2. First seen by cve.now

Affected versions

  • jeremyckahn Chitchatter

    Version range not reported

References 8

VulDB

GitHub · 0xGenesi/CVE

GitHub · jeremyckahn/chitchatter