Vulnerability · Published Aug 18, 2026 · Assigned by GitHub_M

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

High 8.8

In plain English

A high-severity path traversal in streambert from truelockmc. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.2%top 92.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
truelockmc	streambert	< 2.5.0

Weakness: CWE-22, CWE-73 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/truelockmc/streambert/security/advisories/GHSA-v74h-2468-rxhh x_refsource_CONFIRM