CVE-2026-73513 Envoy: oghttp2 upstream trailers incorrect handling

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 optional oghttp2 upstream HTTP/2 codec accepts a response trailer HEADERS frame without ENDSTREAM. Envoy completes and deferred-deletes the ActiveRequest...

CVE-2026-73513 Envoy: oghttp2 upstream trailers incorrect handling

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 optional oghttp2 upstream HTTP/2 codec accepts a response trailer HEADERS frame without ENDSTREAM. Envoy completes and deferred-deletes the ActiveRequest...

CVE-2026-73513

CVE-2026-73513 is a heap use-after-free in Envoy's optional oghttp2 upstream HTTP/2 codec. When an untrusted upstream sends a response trailer HEADERS frame without the END_STREAM flag, Envoy completes and deferred-deletes the ActiveRequest while oghttp2 keeps the stream open, leaving a dangling ...