{"id":"CVE-2026-73547","summary":"Envoy ext_authz: request `:path` pseudoheader dereferenced w/o null check","details":"Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's ext_authz filter assumes that a request contains a :path pseudoheader when applying query_parameters_to_set or query_parameters_to_remove from an authorization response. A path-less CONNECT request makes request_headers_-\u003ePath() return null, and Filter::onComplete dereferences that pointer while parsing the query string. An unauthenticated downstream client can crash the Envoy process when the filter and authorization response use query-parameter mutation. The relevant scope boundary is that the deployment must accept path-less CONNECT and configure ext_authz query-parameter mutation. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.","aliases":["GHSA-87ph-jqwm-pg6r"],"modified":"2026-09-24T03:45:44.962075376Z","published":"2026-09-21T19:47:54.720Z","related":["openSUSE-SU-2026:11630-1"],"database_specific":{"cwe_ids":["CWE-20","CWE-476"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73547.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/envoyproxy/envoy/releases/tag/v1.36.10"},{"type":"WEB","url":"https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"},{"type":"WEB","url":"https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"},{"type":"WEB","url":"https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73547.json"},{"type":"ADVISORY","url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-87ph-jqwm-pg6r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73547"},{"type":"FIX","url":"https://github.com/envoyproxy/envoy/commit/064af2e61d0d1c421490d9e3e6e643c5d117ffe4"},{"type":"FIX","url":"https://github.com/envoyproxy/envoy/commit/5f3b8e9b2b8a787a63202d35bb38820f3e9271fe"},{"type":"FIX","url":"https://github.com/envoyproxy/envoy/commit/838f8ffd9d7b5217682a22ee33470d4c7afb7e98"},{"type":"FIX","url":"https://github.com/envoyproxy/envoy/commit/c3170d7c747e51bb8254378ea89afc03d3e71929"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/envoyproxy/envoy","events":[{"introduced":"0"},{"introduced":"6d9bb7d9a85d616b220d1f8fe67b61f82bbdb8d3"},{"introduced":"f1dd21b16c244bda00edfb5ffce577e12d0d2ec2"},{"introduced":"8eea3285d6bdb89f8ea34632cfe7ce1608a8f374"},{"fixed":"053a8989382dd91542ecf0cef8f379b9cb761cdd"},{"fixed":"cf413bdb37b36d3ffbe570b8a48760abe2b588f5"},{"fixed":"ef2d997c1b022cf8b849a1d3521fbf234d79ca26"},{"fixed":"b579d07d3ad7ee11d32b105e91a5a39ad24718d7"},{"fixed":"064af2e61d0d1c421490d9e3e6e643c5d117ffe4"},{"fixed":"5f3b8e9b2b8a787a63202d35bb38820f3e9271fe"},{"fixed":"838f8ffd9d7b5217682a22ee33470d4c7afb7e98"},{"fixed":"c3170d7c747e51bb8254378ea89afc03d3e71929"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"1.36.10"},{"introduced":"1.37.0"},{"fixed":"1.37.6"},{"introduced":"1.38.0"},{"fixed":"1.38.4"},{"introduced":"1.39.0"},{"fixed":"1.39.1"}]}}],"versions":["v1.39.0","v1.36.9","v1.38.3","v1.37.5","v1.38.2","v1.37.4","v1.36.8","v1.38.1","v1.37.3","v1.36.7","v1.38.0","v1.37.2","v1.36.6","v1.37.1","v1.36.5","v1.37.0","v1.36.4","v1.36.3","v1.36.2","v1.36.1","v1.36.0","v1.35.0","v1.34.0","v1.33.0","v1.32.0","v1.31.0","v1.30.0","v1.29.0","v1.28.0","v1.27.0","v1.26.0","v1.25.0","v1.24.0","v1.23.0","v1.22.0","v1.21.0","v1.20.0","v1.19.0","v1.18.2","v1.18.1","v1.18.0","v1.17.0","v1.16.0","v1.15.0","v1.14.0","v1.13.0","v1.12.0","v1.11.0","v1.10.0","v1.9.0","v1.8.0","v1.7.0","v1.6.0","v1.5.0","v1.4.0","v1.3.0","v1.2.0","v1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73547.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}