CVE-2022-21122

Name: CVE-2022-21122
Creator: NVD / NIST
Published: 2022-06-08T09:15:08.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.39%

Last modified Jun 17, 2026

CVE-2022-21122 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The package metacalc before 0.0.2 are vulnerable to Arbitrary Code Execution when it exposes JavaScript's Math class to the v8 context. As the Math class is exposed to user-land, it can be used to get access to JavaScript's Function constructor.. EPSS estimates a 2.39% chance of exploitation in the next 30 days.

Description

The package metacalc before 0.0.2 are vulnerable to Arbitrary Code Execution when it exposes JavaScript's Math class to the v8 context. As the Math class is exposed to user-land, it can be used to get access to JavaScript's Function constructor.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.39%

81.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Metarhia	Metacalc	< 0.0.2

References

https://github.com/metarhia/metacalc/commit/625c23d63eabfa16fc815f5832b147b08d2144bdPatch, Third Party Advisory
https://github.com/metarhia/metacalc/pull/16Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-METACALC-2826197Exploit, Third Party Advisory
https://github.com/metarhia/metacalc/commit/625c23d63eabfa16fc815f5832b147b08d2144bdPatch, Third Party Advisory
https://github.com/metarhia/metacalc/pull/16Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-METACALC-2826197Exploit, Third Party Advisory

Timeline

Published: Jun 8, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21122?

How severe is CVE-2022-21122?

CVE-2022-21122 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.39% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21122?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-21122?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST