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    CVE-2021-4435

    An untrusted search path vulnerability was found in Yarn. When a victim runs certain Yarn commands in a directory with attacker-controlled content, malicious commands could be executed in unexpected ways.

    Published:Sep 20, 2021
    Last Modified:Jun 17, 2025
    EPS:Feb 4, 2024
    EPSS Score:0.00039
    CVSS Score:7.7

    Affected Products

    Vendor
    Yarnpkg
    Product
    Yarn

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-426 Untrusted Search Path

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-38 Leveraging/Manipulating Configuration File Search Paths

    Related CVEs

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    CVE-2025-8262 (CVSS 5.3) — A vulnerability was found in yarnpkg Yarn up to 1.22.22. It has been classified as problematic. Affected is th…
    CVE-2019-15608 (CVSS 5.9) — The package integrity validation in yarn < 1.19.0 contains a TOCTOU vulnerability where the hash is computed b…
    CVE-2020-8131 (CVSS 7.5) — Arbitrary filesystem write vulnerability in Yarn before 1.22.0 allows attackers to write to any path on the fi…
    CVE-2019-10773 (CVSS 7.8) — In Yarn before 1.21.1, the package install functionality can be abused to generate arbitrary symlinks on the h…
    CVE-2019-5448 (CVSS 8.1) — Yarn before 1.17.3 is vulnerable to Missing Encryption of Sensitive Data due to HTTP URLs in lockfile causing …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High