{"id":"CVE-2026-47220","summary":"Envoy: Segmentation fault when using %REQUESTED_SERVER_NAME% in log format","details":"Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, when the %REQUESTED_SERVER_NAME(X:Y)% is used in log format and host related options is specified, like HOST_FIRST, SNI_FIRST, it's possible to crash Envoy when the specified host header is missing in the request headers. This vulnerability is fixed in 1.37.5 and 1.38.3.","aliases":["BIT-envoy-2026-47220","GHSA-j9wh-4qfm-wf2v"],"modified":"2026-07-08T08:26:14.105128314Z","published":"2026-06-26T18:02:17.679Z","related":["openSUSE-SU-2026:11141-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-476"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47220.json"},"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47220.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-47220"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47220.json"},{"type":"ADVISORY","url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j9wh-4qfm-wf2v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47220"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2493652"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/envoyproxy/envoy","events":[{"introduced":"6d9bb7d9a85d616b220d1f8fe67b61f82bbdb8d3"},{"fixed":"f97695a50e11f5ff6719e129a466bf9204b64a7f"},{"introduced":"f1dd21b16c244bda00edfb5ffce577e12d0d2ec2"},{"fixed":"0ebfcfe5b0484b89ca85b761da9e05ce75dbda8d"}],"database_specific":{"extracted_events":[{"introduced":"1.37.0"},{"fixed":"1.37.5"},{"introduced":"1.38.0"},{"fixed":"1.38.3"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*"}}],"versions":["v1.38.2","v1.37.4","v1.38.1","v1.37.3","v1.38.0","v1.37.2","v1.37.1","v1.37.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47220.json"}}],"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"}]}