GitHub Advisoryadvisory · npm

GHSA-8j8c-7jfh-h6hx Code Injection in js-yaml

HIGH Published 2019-06-04 Modified 2020-08-31 Official page ↗
Ecosystem
npm
Packages
js-yaml
Severity
High
Weaknesses
CWE-94
Reviewed
2019-06-04

Affected packages

• npm js-yaml: < 3.13.1 → fixed in 3.13.1

Description

Versions of `js-yaml` prior to 3.13.1 are vulnerable to Code Injection. The `load()` function may execute arbitrary code injected through a malicious YAML file. Objects that have `toString` as key, JavaScript code as value and are used as explicit mapping keys allow attackers to execute the supplied code through the `load()` function. The `safeLoad()` function is unaffected. An example payload is `{ toString: ! 'function (){return Date.now()}' } : 1` which returns the object { "1553107949161": 1 } Recommendation Upgrade to version 3.13.1.

Related

Weakness · CWE (1)

  • CWE-94 Improper Control of Generation of Code weakness

References