{"cve":"CVE-2021-33194","nvd":{"published":"2021-05-26T15:15:08.217","modified":"2026-06-17T03:54:20.090","status":"Modified","description":"golang.org/x/net before v0.0.0-20210520170846-37e1c6afe023 allows attackers to cause a denial of service (infinite loop) via crafted ParseFragment input.","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-835"],"references":["https://github.com/golang/net/commit/37e1c6afe02340126705deced573a85ab75209d7","https://groups.google.com/g/golang-announce/c/wPunbCPkWUg","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/","https://github.com/golang/net/commit/37e1c6afe02340126705deced573a85ab75209d7","https://groups.google.com/g/golang-announce/c/wPunbCPkWUg"],"products":["fedoraproject:fedora","golang:go"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-33194","score":0.07492,"percentile":0.94482,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-83g2-8m93-v3w7","url":"https://osv.dev/vulnerability/GHSA-83g2-8m93-v3w7","summary":"golang.org/x/net/html Infinite Loop vulnerability","modified":"2026-09-10T03:49:20.895675199Z","packages":[{"ecosystem":"Go","name":"golang.org/x/net","purl":"pkg:golang/golang.org/x/net","ranges":["<0.0.0-20210520170846-37e1c6afe023"],"fixed":["0.0.0-20210520170846-37e1c6afe023"]}]},{"id":"GO-2021-0238","url":"https://osv.dev/vulnerability/GO-2021-0238","summary":"Infinite loop when parsing inputs in golang.org/x/net/html","modified":"2026-02-04T04:07:26.699006Z","packages":[{"ecosystem":"Go","name":"golang.org/x/net","purl":"pkg:golang/golang.org/x/net","ranges":["<0.0.0-20210520170846-37e1c6afe023"],"fixed":["0.0.0-20210520170846-37e1c6afe023"]}]}],"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."]}