Vulnerability · Published Mar 27, 2026 · Assigned by GitHub_M

CVE-2026-33989@mobilenext/mobile-mcp alllows arbitrary file write via Path Traversal in mobile screen capture tools

High 8.1

In plain English

A high-severity path traversal in mobile-mcp from mobile-next. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.5%top 57.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Mobile Next is an MCP server for mobile development and automation. Prior to version 0.0.49, the `@mobilenext/mobile-mcp` server contains a Path Traversal vulnerability in the `mobile_save_screenshot` and `mobile_start_screen_recording` tools. The `saveTo` and `output` parameters were passed directly to filesystem operations without validation, allowing an attacker to write files outside the intended workspace. Version 0.0.49 fixes the issue.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@mobilenext/mobile-mcp	0.0.49	GHSA-3p2m-h2v6-g9mx

Affected products (as reported)

Vendor	Product	Versions
mobile-next	mobile-mcp	< 0.0.49

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

References

https://github.com/mobile-next/mobile-mcp/security/advisories/GHSA-3p2m-h2v6-g9mx x_refsource_CONFIRM
https://github.com/mobile-next/mobile-mcp/commit/f5e32295903128c1e71cf915ae6c0b76c7b0153b x_refsource_MISC
https://github.com/mobile-next/mobile-mcp/releases/tag/0.0.49 x_refsource_MISC