{"id":"CVE-2019-18836","aliases":["EUVD-2019-8537","GHSA-3xvf-4396-cj46","GHSA-4r53-8549-7m3r"],"status":"published","title":"Envoy before 1.12.1 allows a remote denial of service because of resource loops, as demonstrated...","description":"Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used.\"","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01938,"percentile":0.80247,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-835"],"published":"2019-11-11T00:17:35Z","modified":"2026-10-20T10:50:50Z","products":[{"vendor":"envoyproxy","product":"envoy"},{"vendor":"istio","product":"istio"}],"references":[{"url":"https://groups.google.com/forum/#%21forum/envoy-users","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"https://blog.envoyproxy.io","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xvf-4396-cj46","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://github.com/istio/istio/issues/18229","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-18836"},{"url":"https://groups.google.com/forum/#!forum/envoy-users"},{"url":"https://github.com/advisories/GHSA-4r53-8549-7m3r"}],"sources":{"cve":[{"id":"CVE-2019-18836","description":"Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used.\"","status":"published","published":"2019-11-11T00:17:35Z","modified":"2024-08-05T02:02:39.447Z","updated_at":"2026-11-02T14:32:23.803059Z"}],"euvd":[{"id":"EUVD-2019-8537","description":"Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used.\"","status":"published","published":"2019-11-11T00:17:35Z","modified":"2024-08-05T02:02:39Z","updated_at":"2026-11-03T02:40:27.303586Z"}],"ghsa":[{"id":"GHSA-4r53-8549-7m3r","title":"Envoy before 1.12.1 allows a remote denial of service because of resource loops, as demonstrated...","description":"Envoy before 1.12.1 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used.","status":"published","published":"2022-05-24T17:00:42Z","modified":"2023-01-28T05:08:10Z","updated_at":"2026-11-02T14:44:36.474417Z"}],"nvd":[{"id":"CVE-2019-18836","description":"Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used.\"","status":"published","published":"2019-11-11T01:15:10.21Z","modified":"2026-06-17T02:25:26.32Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-835"],"updated_at":"2026-11-02T14:05:35.052973Z"}],"osv":[{"id":"CVE-2019-18836","description":"Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used.\"","status":"published","published":"2019-11-11T01:15:10.21Z","modified":"2026-10-20T10:50:50.570883115Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:11.673963Z"}]}}