{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-73547","sourceIdentifier":"security-advisories@github.com","published":"2026-09-21T20:17:28.230","lastModified":"2026-10-06T15:34:36.113","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"envoyproxy","product":"envoy","versions":[{"version":"\u003c 1.36.10","status":"affected"},{"version":"\u003e= 1.37.0, \u003c 1.37.6","status":"affected"},{"version":"\u003e= 1.38.0, \u003c 1.38.4","status":"affected"},{"version":"\u003e= 1.39.0, \u003c 1.39.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-22T14:15:38.926679Z","id":"CVE-2026-73547","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-20"},{"lang":"en","value":"CWE-476"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionEndExcluding":"1.36.10","matchCriteriaId":"6A420B14-9ADA-4F6B-ACAA-3045E8690F04"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.37.0","versionEndExcluding":"1.37.6","matchCriteriaId":"1AD376F3-22D7-4BFB-B00C-BD68F464436F"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.38.0","versionEndExcluding":"1.38.4","matchCriteriaId":"840E030F-8746-4DBD-87C0-5DF7896294CC"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.39.0","versionEndExcluding":"1.39.1","matchCriteriaId":"B5C1C594-8142-4F51-BE50-1AF50FD07129"}]}]}],"references":[{"url":"https://github.com/envoyproxy/envoy/commit/064af2e61d0d1c421490d9e3e6e643c5d117ffe4","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/envoyproxy/envoy/commit/5f3b8e9b2b8a787a63202d35bb38820f3e9271fe","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/envoyproxy/envoy/commit/838f8ffd9d7b5217682a22ee33470d4c7afb7e98","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/envoyproxy/envoy/commit/c3170d7c747e51bb8254378ea89afc03d3e71929","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.36.10","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.37.6","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.38.4","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.39.1","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-87ph-jqwm-pg6r","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]}]}}