{"id":"CVE-2026-48090","summary":"Envoy HTTP: OAuth2 filter late async token completion after stream teardown (UAF / crash risk)","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, the HTTP OAuth2 filter (envoy.filters.http.oauth2) can leave an in-flight async token exchange attached to a downstream stream that has already been torn down. A late AsyncClient completion can still invoke OAuth2Filter methods that use StreamDecoderFilterCallbacks after that object’s lifetime has ended, causing undefined behavior, worker crashes (availability loss), and use-after-free / invalid-vptr failures under AddressSanitizer. This is a memory-safety / lifetime issue in the data plane, not a trivial config bug. Remote code execution is not claimed here; the primary demonstrated impact is DoS via crash and UB; any further impact would be deployment- and allocator-dependent.  This vulnerability is fixed in 1.37.5 and 1.38.3.","aliases":["BIT-envoy-2026-48090","GHSA-3cj2-c63f-q26f"],"modified":"2026-07-15T01:49:01.870585633Z","published":"2026-06-26T18:03:05.257Z","related":["openSUSE-SU-2026:11141-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-416"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48090.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48090.json"},{"type":"ADVISORY","url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cj2-c63f-q26f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48090"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/envoyproxy/envoy","events":[{"introduced":"6d9bb7d9a85d616b220d1f8fe67b61f82bbdb8d3"},{"fixed":"f97695a50e11f5ff6719e129a466bf9204b64a7f"},{"introduced":"f1dd21b16c244bda00edfb5ffce577e12d0d2ec2"},{"fixed":"0ebfcfe5b0484b89ca85b761da9e05ce75dbda8d"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.37.0"},{"fixed":"1.37.5"},{"introduced":"1.38.0"},{"fixed":"1.38.3"}]}}],"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-2026-48090.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}