CVE-2021-39135

nodejs-arborist: symlink following vulnerability

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Severity

Important

Red Hat Product Security

8.1

CVSS 3.1

Review impact separately from score.

Published · August 31, 2021

Updated · November 21, 2025

Description

A flaw was found in nodejs-arborist. Arborist could write package dependencies to any arbitrary location on the file system if an attacker had replaced a project folder with a symbolic link in the node_modules folder. The highest threat from this vulnerability is to data integrity and system availability.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

CWE-59 · Improper Link Resolution Before File Access ('Link Following')