CVE
GHSA-8j8c-7jfh-h6hx
Code Injection in js-yaml
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: !tag:yaml.org,2002:js/function 'function (){return Date.now()}' } : 1
which returns the object
{
"1553107949161": 1
}
Recommendation
Upgrade to version 3.13.1.
Package Versions Affected
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
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C
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C
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References
Basic Information
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