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CVE-2026-52872— Streambert: Local File Exfiltration and Overwrite via Subtitle file: Protocol

Quick assessment

Affected
truelockmc streambert
Exploitation
Public or AI PoC available; prioritize validation
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之前版本存在安全漏洞，该漏洞源于downloadSubtitleFile工具接受使用file: URI方案的渲染器提供的字幕URL，并将解码后的路径传递给fs.copyFileSync，同时渲染器控制目标路径，可能将任意可读文件复制到攻击者选择的可写位置，导致敏感本地数据泄露并覆盖现有可写文件。

CVSS 8.8 · High EPSS 0.14% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
truelockmc streambert < 2.5.0 affected
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I. Basic Information for CVE-2026-52872

Vulnerability Information
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Vulnerability Title
Streambert: Local File Exfiltration and Overwrite via Subtitle file: Protocol
Source: CVE Program / CVE List V5
Vulnerability Description
Streambert is a cross-platform Electron Desktop App to stream and download video content. Prior to 2.5.0, the downloadSubtitleFile utility in src/ipc/downloads.js, reached through the run-download IPC channel, accepts a renderer-supplied subtitle url using the file: URI scheme and passes its decoded pathname to fs.copyFileSync. The renderer also controls downloadPath, which determines the destination path. A compromised renderer can therefore copy any file readable by the StreamBERT process into an attacker-chosen writable location, exposing sensitive local data, and can overwrite existing writable files. This vulnerability is fixed in 2.5.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
true_lock Streambert 路径遍历漏洞
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之前版本存在安全漏洞，该漏洞源于downloadSubtitleFile工具接受使用file: URI方案的渲染器提供的字幕URL，并将解码后的路径传递给fs.copyFileSync，同时渲染器控制目标路径，可能将任意可读文件复制到攻击者选择的可写位置，导致敏感本地数据泄露并覆盖现有可写文件。
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 < 2.5.0 -

II. Public POCs for CVE-2026-52872

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 10566 chars
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III. Intelligence Information for CVE-2026-52872

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Vendor Advisories for CVE-2026-52872 (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-2026-52875 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
CVE-2026-52873 6.9 MEDIUM Streambert: Global CSP Removal in Wyzie Redeem Window Enables Unconstrained XSS in Electro

IV. Related Vulnerabilities

Same product: streambert
Same vendor: truelockmc
Same weakness: CWE-22

V. Comments for CVE-2026-52872

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