{"cve":"CVE-2022-41721","nvd":{"published":"2023-01-13T23:15:09.250","modified":"2026-06-17T05:03:42.643","status":"Modified","description":"A request smuggling attack is possible when using MaxBytesHandler. When using MaxBytesHandler, the body of an HTTP request is not fully consumed. When the server attempts to read HTTP2 frames from the connection, it will instead be reading the body of the HTTP request, which could be attacker-manipulated to represent arbitrary HTTP2 requests.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-444"],"references":["https://go.dev/cl/447396","https://go.dev/issue/56352","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X3H3EWQXM2XL5AGBX6UL443JEJ3GQXJN/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X5DXTLLWN6HKI5I35EUZRBISTNZJ75GP/","https://pkg.go.dev/vuln/GO-2023-1495"],"products":["golang:h2c"],"source":"nvd","synced_at":"2026-10-19T21:37:34.931465858+00:00"},"epss":{"cve":"CVE-2022-41721","score":0.01816,"percentile":0.78692,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-fxg5-wq6x-vr4w","url":"https://osv.dev/vulnerability/GHSA-fxg5-wq6x-vr4w","summary":"golang.org/x/net/http2/h2c vulnerable to request smuggling attack","modified":"2026-08-07T08:12:11.339130948Z","packages":[{"ecosystem":"Go","name":"golang.org/x/net","purl":"pkg:golang/golang.org/x/net","ranges":[">=0.0.0-20220524220425-1d687d428aca <0.1.1-0.20221104162952-702349b0e862"],"fixed":["0.1.1-0.20221104162952-702349b0e862"]}]},{"id":"GO-2023-1495","url":"https://osv.dev/vulnerability/GO-2023-1495","summary":"Request smuggling due to improper request handling in golang.org/x/net/http2/h2c","modified":"2026-08-07T08:12:27.419936139Z","packages":[{"ecosystem":"Go","name":"golang.org/x/net","purl":"pkg:golang/golang.org/x/net","ranges":[">=0.0.0-20220524220425-1d687d428aca <0.1.1-0.20221104162952-702349b0e862"],"fixed":["0.1.1-0.20221104162952-702349b0e862"]}]}],"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."]}