{"id":"CVE-2021-33609","aliases":["GHSA-qcgx-crrx-38v5"],"url":"https://o3.security/vulnerability/CVE-2021-33609","summary":"Denial of service in DataCommunicator class in Vaadin 8","details":"Missing check in DataCommunicator class in com.vaadin:vaadin-server versions 8.0.0 through 8.14.0 (Vaadin 8.0.0 through 8.14.0) allows authenticated network attacker to cause heap exhaustion by requesting too many rows of data.","published":"2021-10-13T11:15:07.133Z","modified":"2026-07-09T00:06:05.084508Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"com.vaadin:vaadin-server","fixedVersion":"8.14.1"}],"fix":{"url":"https://github.com/vaadin/framework/pull/12415","label":"vaadin/framework#12415"},"references":[{"type":"ADVISORY","url":"https://vaadin.com/security/cve-2021-33609"},{"type":"FIX","url":"https://github.com/vaadin/framework/pull/12415"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T00:06:05.084508Z"}}