cve.bz

CVE-2021-3918

9.8 criticalEPSS 3.8%

Critical (9.8). EPSS 3.8% chance of exploitation in the next 30 days. Fixed in json-schema 0.4.0.

json-schema is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Severity

CVSS 3.1

9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
3.8% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
CWE
CWE-1321
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-896r-f27r-55mwnpmjson-schema<0.4.00.4.0

References

Check your stackJSON