CVE-2026-28403: Fka Textream

High severity, CVSS 7.6. EPSS: 0.2% chance of exploitation in the next 30 days.

Textream is a free macOS teleprompter app. Prior to version 1.5.1, the `DirectorServer` WebSocket server (`ws://127.0.0.1:<httpPort+1>`) accepts connections from any origin without validating the HTTP `Origin` header during the WebSocket handshake. A malicious web page visited in the same browser session can silently connect to the local WebSocket server and send arbitrary `DirectorCommand` payloads, allowing full remote control of the teleprompter content. Version 1.5.1 fixes the issue.

Affected products

• Fka Textream: before 1.5.1 (fixed in 1.5.1)

Published 2026-03-02. Last modified 2026-06-17.