CVE-2026-48090

Envoy HTTP: OAuth2 filter late async token completion after stream teardown (UAF / crash risk)

Description

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.

Scores

Faiblesses (CWE)

• CWE-416

Références européennes

• ENISA EUVD · EUVD-2026-39830
• GCVE · GCVE-0-2026-48090

Configurations affectées (CPE NVD)

• cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* ≥ 1.37.0 < 1.37.5
• cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* ≥ 1.38.0 < 1.38.3

Produits affectés

Références

• https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cj2-c63f-q26f

Sources