CVE-2022-21211

MEDIUMNVD 5.97.5▲

5.9

This affects all versions of package posix. When invoking the toString method, it will fallback to 0x0 value, as the value of toString is not invokable (not a function), and then it will crash with type-check.

CVSS v3: 5.9
EG Score: 7.5(medium)
EPSS: 62.9%
KEV: Not listed

Published

June 10, 2022

Last Modified

November 21, 2024

References (2)

report@snykhttps://snyk.io/vuln/SNYK-JS-POSIX-2400719
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JS-POSIX-2400719

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
npm	posix	—	ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
posix	—	—	—

Weakness Classification(1)

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

CWE-252Unchecked Return Value

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 20:49 UTCEG score recompute
2026-05-25 20:49 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2022-21211?

CVE-2022-21211 is a medium vulnerability published on June 10, 2022. This affects all versions of package posix. When invoking the toString method, it will fallback to 0x0 value, as the value of toString is not invokable (not a function), and then it will crash with type-check.

When was CVE-2022-21211 disclosed?

CVE-2022-21211 was first published in the National Vulnerability Database on June 10, 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-2022-21211 actively exploited?

CVE-2022-21211 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 62.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-21211?

CVE-2022-21211 has a CVSS v3 base score of 5.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.5.

How do I remediate CVE-2022-21211?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-21211, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-21211

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