Arbitrary Code Execution Affecting js-yaml Open this link in a new tab package, versions <3.13.1


0.0
high
  • Attack Complexity

    High

  • Confidentiality

    High

  • Integrity

    High

  • Availability

    High

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  • snyk-id

    SNYK-JS-JSYAML-174129

  • published

    7 Apr 2019

  • disclosed

    5 Apr 2019

  • credit

    Alex Kocharin

Introduced: 5 Apr 2019

CWE-94 Open this link in a new tab

How to fix?

Upgrade js-yaml to version 3.13.1 or higher.

Overview

js-yaml is a human-friendly data serialization language.

Affected versions of this package are vulnerable to Arbitrary Code Execution. When an object with an executable toString() property used as a map key, it will execute that function. This happens only for load(), which should not be used with untrusted data anyway. safeLoad() is not affected because it can't parse functions.