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Vulnerability record · CVE-2021-33194 · published 26 May 2021

CVE-2021-33194: Golang go vulnerability

Golang · Go

golang.org/x/net before v0.0.0-20210520170846-37e1c6afe023 allows attackers to cause a denial of service (infinite loop) via crafted ParseFragment input.

7.5 CVSS 3.1 High EPSS 7.5% · top 5.7% CWE-835 · CWE-835
7.5CVSS 3.1 base score, v2 5.0
7.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/golang/net/commit/37e1c6afe02340126705deced573a85ab75209d7 PatchThird Party Advisory
https://groups.google.com/g/golang-announce/c/wPunbCPkWUg Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4CHKSFMHZVOBCZSSVRE3UEY
https://github.com/golang/net/commit/37e1c6afe02340126705deced573a85ab75209d7 PatchThird Party Advisory
https://groups.google.com/g/golang-announce/c/wPunbCPkWUg Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4CHKSFMHZVOBCZSSVRE3UEY

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-33194), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.