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CVE-2026-52873— Streambert: Global CSP Removal in Wyzie Redeem Window Enables Unconstrained XSS in Electron Renderer

Quick assessment

Affected
truelockmc streambert
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.

true_lock Streambert是德国true_lock个人开发者的一款跨平台的 Electron 桌面应用。 true_lock Streambert 2.5.0版本至2.6.0之前版本存在安全漏洞，该漏洞源于wyzie-open-redeem IPC处理程序移除Content-Security-Policy标头且缺少setWindowOpenHandler限制，可能导致脚本注入，从而影响其他窗口和持久会话存储，并可能访问内部服务或敏感数据。

CVSS 6.9 · Medium EPSS 0.28% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
truelockmc streambert < 2.6.0 affected
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I. Basic Information for CVE-2026-52873

Vulnerability Information
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Vulnerability Title
Streambert: Global CSP Removal in Wyzie Redeem Window Enables Unconstrained XSS in Electron Renderer
Source: CVE Program / CVE List V5
Vulnerability Description
Streambert is a cross-platform Electron Desktop App to stream and download video content. From version 2.5.0 until version 2.6.0, the wyzie-open-redeem IPC handler in index.js creates the partition:wyzie-redeem Electron session and registers an onHeadersReceived hook that removes the Content-Security-Policy header from every response in that session. The redeem window also lacks a setWindowOpenHandler restriction, so script injection in sub.wyzie.io, a loaded third-party resource, or a site reached through navigation executes without CSP constraints and can affect additional windows and persistent session storage. A user must open the Wyzie API key redemption window, and exploitation requires attacker-controlled script content in a loaded page. The resulting renderer script can invoke renderer-exposed application functionality and can be chained with other vulnerabilities to access internal services or sensitive data. This issue is fixed in version 2.6.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
true_lock Streambert 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
true_lock Streambert是德国true_lock个人开发者的一款跨平台的 Electron 桌面应用。 true_lock Streambert 2.5.0版本至2.6.0之前版本存在安全漏洞，该漏洞源于wyzie-open-redeem IPC处理程序移除Content-Security-Policy标头且缺少setWindowOpenHandler限制，可能导致脚本注入，从而影响其他窗口和持久会话存储，并可能访问内部服务或敏感数据。
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
truelockmc streambert < 2.6.0 -

II. Public POCs for CVE-2026-52873

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III. Intelligence Information for CVE-2026-52873

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Vendor Advisories for CVE-2026-52873 (1)

Vendor Pages for CVE-2026-52873 (1)

Same Patch Batch · truelockmc · 2026-08-18 · 5 CVEs total

CVE-2026-52876 8.8 HIGH Streambert: Arbitrary File Execution via VLC/mpv Launcher Fallback
CVE-2026-52872 8.8 HIGH Streambert: Local File Exfiltration and Overwrite via Subtitle file: Protocol
CVE-2026-52875 8.4 HIGH Streambert: Arbitrary Directory Creation and File Manipulation via Backup Handler
CVE-2026-52877 8.3 HIGH Streambert : Insecure Protocol Execution in open-external IPC Handler

IV. Related Vulnerabilities

Same product: streambert
Same vendor: truelockmc
Same weakness: CWE-79

V. Comments for CVE-2026-52873

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