What’s Vulnerable › Vulnerabilities

CVE-2022-21122: Arbitrary Code Execution

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-06-08 · updated 2026-06-17
• Weakness: CWE-94

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.

Affected products

• metacalc: before 0.0.2 — fixed in 0.0.2

How to fix

Upgrade to a fixed version: metacalc 0.0.2. Check the vendor advisory for mitigations.

References

• https://github.com/metarhia/metacalc/commit/625c23d63eabfa16fc815f5832b147b08d2144bd
• https://github.com/metarhia/metacalc/pull/16
• https://snyk.io/vuln/SNYK-JS-METACALC-2826197
• https://github.com/metarhia/metacalc/commit/625c23d63eabfa16fc815f5832b147b08d2144bd
• https://github.com/metarhia/metacalc/pull/16
• https://snyk.io/vuln/SNYK-JS-METACALC-2826197

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