CVE-2026-28403
Textream Cross-Site WebSocket Hijacking (CSWSH) vulnerability
CVSS Score
7.6
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-346 |
| Vendor | f |
| Product | textream |
| Published | Mar 2, 2026 |
| Last Updated | Mar 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low
Affected Versions
f / textream
< 1.5.1