CVE-2022-21122

CRITICALNVD 9.09.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.0 under NVD CVSS v3. EPSS exploit probability: 2.5% (84th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.5%CVSS: 9.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.0
EG Score
9.0CRITICALmedium confidence
EG Risk
46
EG Risk 46/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation3% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.5%
EPSS %ILE
84th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 8, 2022

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Jul 25, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: github_commit, github_pr.
generic🔴 Active Exploitation

Arbitrary Code Execution in metacalc | CVE-2022-21122 | Snyk

https://snyk.io/vuln/SNYK-JS-METACALC-2826197
github_pr

Prevent arbitrary js code execution

Upstream fix in progress (PR #16 · metarhia/metacalc, state=closed)

https://github.com/metarhia/metacalc/pull/16
github_commit Patch Available

commit 625c23d63eab (metarhia/metacalc)

Patch available: metarhia/metacalc v0.0.2 (contains commit 625c23d63eab)

https://github.com/metarhia/metacalc/commit/625c23d63eabfa16fc815f5832b147b08d2144bd

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
metacalc—0.0.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 168 total refreshes for this CVE.

  1. 2026-10-03 14:23 UTCEPSS rescore
  2. 2026-10-03 14:22 UTCEPSS rescore
  3. 2026-09-30 15:48 UTCEG score recompute
  4. 2026-09-30 15:00 UTCEPSS rescore
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  8. 2026-09-26 00:22 UTCEPSS rescore
  9. 2026-09-24 20:46 UTCOSV refresh
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  24. 2026-09-07 15:58 UTCEPSS rescore
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  1. 2026-09-05 15:25 UTCEPSS rescore
  2. 2026-09-05 12:30 UTCOSV refresh
  3. 2026-09-04 13:57 UTCEPSS rescore
  4. 2026-09-04 05:03 UTCEPSS rescore
  5. 2026-09-02 14:09 UTCEPSS rescore
  6. 2026-09-01 13:51 UTCEPSS rescore
  7. 2026-08-30 19:14 UTCEPSS rescore
  8. 2026-08-30 01:19 UTCEPSS rescore
  9. 2026-08-28 21:38 UTCEPSS rescore
  10. 2026-08-27 14:22 UTCEPSS rescore
  11. 2026-08-26 14:43 UTCEPSS rescore
  12. 2026-08-25 13:46 UTCEPSS rescore
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  14. 2026-08-21 23:46 UTCEPSS rescore
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  16. 2026-08-19 17:01 UTCEPSS rescore
  17. 2026-08-18 23:10 UTCOSV refresh
  18. 2026-08-18 13:45 UTCEPSS rescore
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  20. 2026-08-16 14:53 UTCEPSS rescore
  21. 2026-08-16 02:11 UTCEPSS rescore
  22. 2026-08-15 01:27 UTCEPSS rescore
  23. 2026-08-13 21:57 UTCEPSS rescore
  24. 2026-08-12 13:48 UTCEPSS rescore
  25. 2026-08-11 13:38 UTCEPSS rescore
  26. 2026-08-09 13:44 UTCEPSS rescore
  27. 2026-08-08 16:34 UTCEPSS rescore
  28. 2026-08-07 16:24 UTCEPSS rescore
  29. 2026-08-06 13:44 UTCEPSS rescore
  30. 2026-08-05 19:15 UTCEPSS rescore
  31. 2026-08-04 15:06 UTCEPSS rescore
  32. 2026-08-04 10:34 UTCEPSS rescore
  33. 2026-08-03 18:57 UTCOSV refresh
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  37. 2026-07-30 16:25 UTCEPSS rescore
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  40. 2026-07-26 14:52 UTCEPSS rescore
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  43. 2026-07-24 14:15 UTCEPSS rescore
  44. 2026-07-23 14:16 UTCEPSS rescore
  45. 2026-07-23 02:07 UTCEG score recompute
  46. 2026-07-22 22:54 UTCEG score recompute
  47. 2026-07-22 14:06 UTCEPSS rescore
  48. 2026-07-21 15:22 UTCEPSS rescore
  49. 2026-07-21 15:22 UTCEPSS rescore
  50. 2026-07-20 17:05 UTCEPSS rescore
  51. 2026-07-19 14:29 UTCEPSS rescore
  52. 2026-07-19 02:27 UTCEPSS rescore
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  54. 2026-07-18 10:02 UTCEPSS rescore
  55. 2026-07-17 08:46 UTCOSV refresh
  56. 2026-07-16 17:00 UTCEPSS rescore
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  58. 2026-07-15 16:55 UTCEPSS rescore
  59. 2026-07-15 01:58 UTCEPSS rescore
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  66. 2026-07-09 19:07 UTCEPSS rescore
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  68. 2026-07-08 15:12 UTCEPSS rescore
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  70. 2026-07-07 13:43 UTCEPSS rescore
  71. 2026-07-06 16:25 UTCEPSS rescore
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  73. 2026-07-06 02:21 UTCEPSS rescore
  74. 2026-07-06 02:21 UTCEPSS rescore
  75. 2026-07-05 02:28 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2022-21122?
CVE-2022-21122 is a critical vulnerability published on June 8, 2022. 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.
When was CVE-2022-21122 disclosed?
CVE-2022-21122 was first published on June 8, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-21122 actively exploited?
CVE-2022-21122 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.5% probability of exploitation in the next 30 days (84th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-21122?
CVE-2022-21122 has a CVSS v3 base score of 9.0 (NVD).
How do I remediate CVE-2022-21122?
A fix for CVE-2022-21122 is available: update to the fixed version the vendor names in its advisory.

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