CVE-2025-13437

MEDIUM

zx - Use After Free

Title source: llm
STIX 2.1

Description

When zx is invoked with --prefer-local=<path>, the CLI creates a symlink named ./node_modules pointing to <path>/node_modules. Due to a logic error in src/cli.ts (linkNodeModules / cleanup), the function returns the target path instead of the alias (symlink path). The later cleanup routine removes what it received, which deletes the target directory itself. Result: zx can delete an external <path>/node_modules outside the current working directory.

Scores

CVSS v4 5.6
EPSS 0.0002
EPSS Percentile 4.6%
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/E:U

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-706
Status published
Products (2)
Google/zx 8.8.4
npm/zx 0 - 8.8.5npm
Published Nov 20, 2025
Tracked Since Feb 18, 2026