{"schemaVersion":3,"id":"CVE-2026-50572","aliases":[],"status":"published","duplicateOf":null,"title":"Envoy: ext_authz - RawHttpClientImpl onSuccess 0x0 segfault","description":"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 HTTP external-authorization client can retain a stale request callback after a request is rejected. When RawHttpClientImpl::onSuccess later processes the authorization response, it can invoke callbacks_ after the callback owner has been destroyed, causing a use-after-free and process crash under production traffic. The relevant scope boundary is that the vulnerable path uses the HTTP ext_authz client; the advisory does not establish the same trigger for unrelated filters. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.","dates":{"published":"2026-09-21T19:32:00.008Z","modified":"2026-09-22T13:30:59.295Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.9,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0068,"percentile":0.51823,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.0068},"history":[{"date":"2026-09-22T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.0068,"percentile":0.51823}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0068,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.0068,"percentile":0.51823}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-416","name":"Use After Free","description":"The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","type":"weakness","status":"Stable","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/416.html"}],"affected":[{"vendor":"envoyproxy","product":"envoy","name":"envoy","label":"envoy","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.36.10","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.37.0, < 1.37.6","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.38.0, < 1.38.4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.39.0, < 1.39.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.36.10 | ≥ 1.37.0, < 1.37.6 | ≥ 1.38.0, < 1.38.4 | ≥ 1.39.0, < 1.39.1","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"envoy","label":"Envoy","category":"server-app"}},"hubHref":"/vendor/envoyproxy/envoy"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-q8wp-gf7q-m8cv","label":"github.com/envoyproxy/envoy/security/advisories/GHSA-q8wp-gf7q-m8cv","hostname":"github.com","tags":["X Refsource CONFIRM","Vendor Advisory"]},{"url":"https://github.com/envoyproxy/envoy/commit/8dacef38337aeffd62866b5c5910104b63b33db8","label":"github.com/envoyproxy/envoy/commit/8dacef38337aeffd62866b5c5910104b63b33db8","hostname":"github.com","tags":["X Refsource MISC","Patch"]},{"url":"https://github.com/envoyproxy/envoy/commit/a49085623654e27e9ad6298928557644b849d7ce","label":"github.com/envoyproxy/envoy/commit/a49085623654e27e9ad6298928557644b849d7ce","hostname":"github.com","tags":["X Refsource MISC","Patch"]},{"url":"https://github.com/envoyproxy/envoy/commit/c1b29534a294cb0999e99e1fe0de000310165f03","label":"github.com/envoyproxy/envoy/commit/c1b29534a294cb0999e99e1fe0de000310165f03","hostname":"github.com","tags":["X Refsource MISC","Patch"]},{"url":"https://github.com/envoyproxy/envoy/commit/c524571ffad517ba650d9563f85afa89194e2cfb","label":"github.com/envoyproxy/envoy/commit/c524571ffad517ba650d9563f85afa89194e2cfb","hostname":"github.com","tags":["X Refsource MISC","Patch"]},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.36.10","label":"github.com/envoyproxy/envoy/releases/tag/v1.36.10","hostname":"github.com","tags":["X Refsource MISC","Release Notes"]},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.37.6","label":"github.com/envoyproxy/envoy/releases/tag/v1.37.6","hostname":"github.com","tags":["X Refsource MISC","Release Notes"]},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.38.4","label":"github.com/envoyproxy/envoy/releases/tag/v1.38.4","hostname":"github.com","tags":["X Refsource MISC","Release Notes"]},{"url":"https://github.com/envoyproxy/envoy/releases/tag/v1.39.1","label":"github.com/envoyproxy/envoy/releases/tag/v1.39.1","hostname":"github.com","tags":["X Refsource MISC","Release Notes"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:11630-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:11630-1"]},"timeline":[{"kind":"published","date":"2026-09-21T19:32:00.008Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-22T13:30:59.295Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":24,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T17:06:15.266Z","stale":false,"partial":false}}