[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fdzz52nre9stqeq3RI7TiLeVLGM1VXAMxNxIOa9Xlqgc":3,"g5a-risk:CVE-2021-21409":435},{"success":4,"data":5,"meta":433},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":42,"epssPercentile":26,"epssTimeSeries":43,"severity":44,"affectedProducts":45,"affectedProductsCount":134,"references":135,"referencesCount":291,"weaknesses":292,"weaknessesCount":301,"isActivelyExploited":302,"cisaInfo":26,"otxData":26,"relatedBlogPosts":303,"seoMetadata":304,"configurations":329,"relatedVendorCves":417,"notableEvents":418},"CVE-2021-21409","What is CVE-2021-21409?","Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP\u002F1.1. This is a followup of GHSA-wm47-8v5p-wjpj\u002FCVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.","Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & 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