{"id":"CVE-2021-43824","details":"Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade.","aliases":["BIT-envoy-2021-43824","GHSA-vj5m-rch8-5r2p"],"modified":"2026-05-15T11:54:18.946771093Z","published":"2022-02-22T23:15:10.813Z","database_specific":{},"references":[{"type":"REPORT","url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p"},{"type":"FIX","url":"https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a"}],"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"}]}