{"api_version":"1","generated_at":"2026-07-23T21:14:03+00:00","cve":"CVE-2020-4038","urls":{"html":"https://cve.report/CVE-2020-4038","api":"https://cve.report/api/cve/CVE-2020-4038.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-4038","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-4038"},"summary":{"title":"CVE-2020-4038","description":"GraphQL Playground (graphql-playground-html NPM package) before version 1.6.22 have a severe XSS Reflection attack vulnerability. All unsanitized user input passed into renderPlaygroundPage() method could trigger this vulnerability. This has been patched in graphql-playground-html version 1.6.22. 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All unsanitized user input passed into renderPlaygroundPage() method could trigger this vulnerability. This has been patched in graphql-playground-html version 1.6.22. Note that some of the associated dependent middleware packages are also affected including but not limited to graphql-playground-middleware-express before version 1.7.16, graphql-playground-middleware-koa before version 1.6.15, graphql-playground-middleware-lambda before version 1.7.17, and graphql-playground-middleware-hapi before 1.6.13.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"4038","Ordinal":"2","NoteData":"2020-06-08","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"4038","Ordinal":"3","NoteData":"2020-06-08","Type":"Other","Title":"Modified"}]}}}