{"id":"CVE-2021-3859","details":"A flaw was found in Undertow that tripped the client-side invocation timeout with certain calls made over HTTP2. This flaw allows an attacker to carry out denial of service attacks.","aliases":["GHSA-339q-62wm-c39w"],"modified":"2026-05-15T12:04:11.709253993Z","published":"2022-08-26T16:15:09.623Z","database_specific":{"unresolved_ranges":[{"vendor_product":"redhat:jboss_enterprise_application_platform","source":"CPE_FIELD","cpes":["cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.3:*:*:*:*:*:*:*","cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.4:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"7.3"},{"last_affected":"7.4"}]},{"vendor_product":"redhat:single_sign-on","source":"CPE_FIELD","extracted_events":[{"last_affected":"7.4.10"},{"last_affected":"7.5.1"}],"cpes":["cpe:2.3:a:redhat:single_sign-on:7.4.10:*:*:*:*:*:*:*","cpe:2.3:a:redhat:single_sign-on:7.5.1:*:*:*:*:*:*:*"]}]},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2021-3859"},{"type":"ADVISORY","url":"https://github.com/undertow-io/undertow/pull/1296"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20221201-0004/"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2010378"},{"type":"FIX","url":"https://github.com/undertow-io/undertow/commit/e43f0ada3f4da6e8579e0020cec3cb1a81e487c2"},{"type":"FIX","url":"https://issues.redhat.com/browse/UNDERTOW-1979"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}