{"cve":"CVE-2021-3597","nvd":{"published":"2022-05-24T19:15:09.037","modified":"2026-06-17T04:05:24.497","status":"Modified","description":"A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.35.SP1, prior to 2.2.6.SP1, prior to 2.2.7.SP1, prior to 2.0.36.SP1, prior to 2.2.9.Final and prior to 2.0.39.Final.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9},"cwes":["CWE-362"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1970930","https://security.netapp.com/advisory/ntap-20220804-0003/","https://bugzilla.redhat.com/show_bug.cgi?id=1970930","https://security.netapp.com/advisory/ntap-20220804-0003/"],"products":["netapp:active_iq_unified_manager","netapp:oncommand_insight","netapp:oncommand_workflow_automation","redhat:fuse","redhat:jboss_enterprise_application_platform","redhat:openshift_application_runtimes","redhat:single_sign-on","redhat:undertow"],"source":"nvd","synced_at":"2026-10-19T21:31:59.322382750+00:00"},"epss":{"cve":"CVE-2021-3597","score":0.01161,"percentile":0.672,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-mfhv-gwf8-4m88","url":"https://osv.dev/vulnerability/GHSA-mfhv-gwf8-4m88","summary":"undertow Race Condition vulnerability","modified":"2024-02-17T05:20:54.600492Z","packages":[{"ecosystem":"Maven","name":"io.undertow:undertow-core","purl":"pkg:maven/io.undertow/undertow-core","ranges":[">=2.1.0 <2.2.9.Final"],"fixed":["2.2.9.Final"]},{"ecosystem":"Maven","name":"io.undertow:undertow-core","purl":"pkg:maven/io.undertow/undertow-core","ranges":["<2.0.39.Final"],"fixed":["2.0.39.Final"]}]}],"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."]}