{"cve":"CVE-2021-33609","nvd":{"published":"2021-10-13T11:15:07.133","modified":"2026-06-17T03:54:52.117","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","score":4.3},"cwes":["CWE-20","CWE-400"],"references":["https://github.com/vaadin/framework/pull/12415","https://vaadin.com/security/cve-2021-33609","https://github.com/vaadin/framework/pull/12415","https://vaadin.com/security/cve-2021-33609"],"products":["vaadin:vaadin"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-33609","score":0.00945,"percentile":0.61096,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-qcgx-crrx-38v5","url":"https://osv.dev/vulnerability/GHSA-qcgx-crrx-38v5","summary":"Denial of service in DataCommunicator class in Vaadin 8","modified":"2024-05-15T05:49:24.261871Z","packages":[{"ecosystem":"Maven","name":"com.vaadin:vaadin-server","purl":"pkg:maven/com.vaadin/vaadin-server","ranges":[">=8.0.6 <8.14.1"],"fixed":["8.14.1"]}]}],"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."]}