{"cve":"CVE-2020-15366","nvd":{"published":"2020-07-15T20:15:13.380","modified":"2026-06-17T02:56:34.053","status":"Modified","description":"An issue was discovered in ajv.validate() in Ajv (aka Another JSON Schema Validator) 6.12.2. A carefully crafted JSON schema could be provided that allows execution of other code by prototype pollution. (While untrusted schemas are recommended against, the worst case of an untrusted schema should be a denial of service, not execution of code.)","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","score":5.6},"cwes":["CWE-1321"],"references":["https://github.com/ajv-validator/ajv/releases/tag/v6.12.3","https://github.com/ajv-validator/ajv/tags","https://hackerone.com/bugs?subject=user&report_id=894259","https://security.netapp.com/advisory/ntap-20240621-0007/","https://github.com/ajv-validator/ajv/releases/tag/v6.12.3"],"products":["ajv.js:ajv"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-15366","score":0.02313,"percentile":0.83405,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v88g-cgmw-v5xw","url":"https://osv.dev/vulnerability/GHSA-v88g-cgmw-v5xw","summary":"Prototype Pollution in Ajv","modified":"2024-06-21T21:33:48Z","packages":[{"ecosystem":"npm","name":"ajv","purl":"pkg:npm/ajv","ranges":["<6.12.3"],"fixed":["6.12.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}