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CVE-2026-28403— Textream Cross-Site WebSocket Hijacking (CSWSH) vulnerability

Quick assessment

Affected
f textream
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Textream是Fatih Kadir Akın个人开发者的一个提词器应用程序。 Textream 1.5.1之前版本存在访问控制错误漏洞，该漏洞源于DirectorServer WebSocket服务器在握手时未验证HTTP Origin标头，可能导致恶意网页远程控制提词器内容。

CVSS 7.6 · High EPSS 0.18% · P7
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I. Basic Information for CVE-2026-28403

Vulnerability Information
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Vulnerability Title
Textream Cross-Site WebSocket Hijacking (CSWSH) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
Textream 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Textream是Fatih Kadir Akın个人开发者的一个提词器应用程序。 Textream 1.5.1之前版本存在访问控制错误漏洞，该漏洞源于DirectorServer WebSocket服务器在握手时未验证HTTP Origin标头，可能导致恶意网页远程控制提词器内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
f textream < 1.5.1 -

II. Public POCs for CVE-2026-28403

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III. Intelligence Information for CVE-2026-28403

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Vendor Advisories for CVE-2026-28403 (1)

IV. Related Vulnerabilities

Same product: textream
Same vendor: f
Same weakness: CWE-346

V. Comments for CVE-2026-28403

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