{"id":"CVE-2021-3690","details":"A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.","aliases":["GHSA-fj7c-vg2v-ccrm"],"modified":"2026-07-09T01:31:23.774057Z","published":"2022-08-23T16:15:09.450Z","database_specific":{"unresolved_ranges":[{"vendor_product":"redhat:fuse","cpes":["cpe:2.3:a:redhat:fuse:1.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"1.0"},{"last_affected":"1.0"}],"source":"CPE_STRING"},{"vendor_product":"redhat:jboss_enterprise_application_platform","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":[{"introduced":"7.3"},{"last_affected":"7.3"},{"introduced":"7.4"},{"last_affected":"7.4"}],"source":"CPE_STRING"}]},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2021-3690"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1991299"},{"type":"REPORT","url":"https://issues.redhat.com/browse/UNDERTOW-1935"},{"type":"FIX","url":"https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/undertow-io/undertow","events":[{"introduced":"0"},{"fixed":"225d62735b189e460a56460207b8c6073fcc3737"},{"introduced":"2291c7c07dc5bccf3b45c4db3a1b63123b8ce484"},{"fixed":"40926588d550bf28f583617d93a0a1520110a2d0"},{"fixed":"c7e84a0b7efced38506d7d1dfea5902366973877"}],"database_specific":{"cpe":"cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.0.40"},{"introduced":"2.1.0"},{"fixed":"2.2.10"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["2.0.39.Final","2.2.9.Final","2.0.38.Final","2.0.37.Final","2.2.8.Final","2.0.36.Final","2.2.7.Final","2.0.35.Final","2.2.6.Final","2.2.5.Final","2.2.3.Final","2.2.4.Final","2.0.34.Final","2.0.33.Final","2.2.2.Final","2.1.4.Final","2.0.32.Final","2.2.1.Final","2.2.0.Final","2.0.31.Final","2.1.3.Final","2.1.2.Final","2.1.1.Final","2.1.0.Final","2.0.30.Final","2.0.29.Final","2.0.28.Final","2.0.27.Final","2.0.26.Final","2.0.25.Final","2.0.24.Final","2.0.23.Final","2.0.22.Final","2.0.21.Final","2.0.20.Final","2.0.17.Final","2.0.16.Final","2.0.15.Final","2.0.14.Final","2.0.13.Final","2.0.12.Final","2.0.11.Final","2.0.10.Final","2.0.9.Final","2.0.8.Final","2.0.7.Final","2.0.6.Final","2.0.5.Final","2.0.4.Final","2.0.3.Final","2.0.2.Final","2.0.1.Final","2.0.0.Final","2.0.0.Beta1","2.0.0.Alpha1","1.3.3.Final","1.3.2.Final","1.3.1.Final","1.3.0.Final","1.3.0.CR3","1.3.0.CR2","1.3.0.CR1","1.3.0.Beta13","1.3.0.Beta12","1.3.0.Beta11","1.3.0.Beta10","1.3.0.Beta9","1.3.0.Beta8","1.3.0.Beta7","1.3.0.Beta6","1.3.0.Beta5","1.3.0.Beta4","1.3.0.Beta3","1.3.0.Beta2","1.3.0.Beta1","1.2.4.Final","1.2.3.Final","1.2.2.Final","1.2.1.Final","1.2.0.Final","1.2.0.CR1","1.2.0.Beta10","1.2.0.Beta9","1.2.0.Beta8","1.2.0.Beta7","1.2.0.Beta6","1.2.0.Beta5","1.2.0.Beta4","1.2.0.Beta3","1.2.0.Beta2","1.2.0.Beta1","1.1.0.Beta8","1.1.0.Beta7","1.1.0.Beta6","1.1.0.Beta5","1.1.0.Beta4","1.1.0.Beta3","1.1.0.Beta2","1.1.0.Beta1","1.0.3.Final","1.0.2.Final","1.0.1.Final","1.0.0.Final","1.0.0.CR4","1.0.0.CR3","1.0.0.CR2","1.0.0.CR1","1.0.0.Beta33","1.0.0.Beta32","1.0.0.Beta31","1.0.0.Beta30","1.0.0.Beta29","1.0.0.Beta28","1.0.0.Beta27","1.0.0.Beta26","1.0.0.Beta25","1.0.0.Beta24","1.0.0.Beta23","1.0.0.Beta22","1.0.0.Beta21","1.0.0.Beta20","1.0.0.Beta19","1.0.0.Beta18","1.0.0.Beta17","1.0.0.Beta16","1.0.0.Beta15","1.0.0.Beta14","1.0.0.Beta13","1.0.0.Beta12","1.0.0.Beta11","1.0.0.Beta10","1.0.0.Beta9","1.0.0.Beta8","1.0.0.Beta7","1.0.0.Beta6","1.0.0.Beta5","1.0.0.Beta4","1.0.0.Beta3","1.0.0.Beta2","1.0.0.Beta1","1.0.0.Alpha22","1.0.0.Alpha21","1.0.0.Alpha20","1.0.0.Alpha19","1.0.0.Alpha18","1.0.0.Alpha17","1.0.0.Alpha16","1.0.0.Alpha15","1.0.0.Alpha14","1.0.0.Alpha13","1.0.0.Alpha12","1.0.0.Alpha11","1.0.0.Alpha10","1.0.0.Alpha9","1.0.0.Alpha8","1.0.0.Alpha7","1.0.0.Alpha6","1.0.0.Alpha5","1.0.0.Alpha4","1.0.0.Alpha3","1.0.0.Alpha2","1.0.0.Alpha1"],"database_specific":{"vanir_signatures_modified":"2026-07-09T01:31:23Z","vanir_signatures":[{"id":"CVE-2021-3690-45402648","signature_type":"Function","signature_version":"v1","source":"https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877","target":{"file":"websockets-jsr/src/main/java/io/undertow/websockets/jsr/FrameHandler.java","function":"onFullPongMessage"},"deprecated":false,"digest":{"function_hash":"187851407789216287730490246308857511865","length":601}},{"signature_version":"v1","source":"https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877","target":{"file":"websockets-jsr/src/main/java/io/undertow/websockets/jsr/FrameHandler.java"},"deprecated":false,"digest":{"line_hashes":["79403700335528539273770068144736272793","79857656579781679713873665099933085318","244125084856819352952595829882912148068","137441744319017044843376062865140644092"],"threshold":0.9},"id":"CVE-2021-3690-e32340ef","signature_type":"Line"}],"source":"https://storage.google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