Envoy v1.36.9 release notes

Envoy v1.36.9

v1.36.9Jun 23, 2026 · 3 months ago

Changed 1

Disabled the contrib extension envoy.network.connection_balance.dlb (Intel DLB connection balancer) at the Bazel layer for all builds and platforms due to a breakage at the source archive

Security 15

Fixed authz per route crash (CVE-2026-47205)
Fixed ext_proc response in one gRPC message (CVE-2026-47207)
Fixed router internal redirects crash (CVE-2026-47221)
Fixed OAuth2 code verifier padding oracle (CVE-2026-47775)
Fixed zstd RLE zip bomb (CVE-2026-48044)
Fixed grpc_stats filter segfault on Connect protocol requests to direct_response routes (CVE-2026-47204)
Fixed PROXY Protocol v2 header generator emitting skipped TLVs causing attacker-controlled spillover into upstream application stream (CVE-2026-47692)
Fixed embedded NUL in TLS SAN truncation and auth bypass (CVE-2026-47778)
Fixed stack overflow in destructor of highly nested JSON (CVE-2026-48042)
Fixed OAuth2 filter late async token completion after stream teardown resulting in use-after-free or crash risk (CVE-2026-48090)
Fixed abnormal process termination in DNS UDP filter (CVE-2026-48497)
Fixed HTTP/3 to HTTP/1 request smuggling via headers-only request with nonzero Content-Length (CVE-2026-48743)
Fixed heap buffer overflow in TcpStatsdSink (CVE-2026-48706)
Fixed denial-of-service attack against HTTP/3 stack via QPACK blocked decoding (GHSA-p7c7-7c47-pwch)
Bumped com_github_wasmtime to resolve CVE-2026-47261

From Envoy

Summary of changes:

Security fixes:
- CVE-2026-47205:Authz per route crash
- CVE-2026-47207: ext_proc response in one gRPC message
- CVE-2026-47221: router internal redirects crash
- CVE-2026-47775: OAuth2 code verifier padding oracle
- CVE-2026-48044: zstd RLE zip bomb
- CVE-2026-47204: grpc_stats filter segfault on Connect protocol requests to direct_response routes
- CVE-2026-47692: PROXY Protocol v2 header generator emits "skipped" TLVs, causing 65 KB attacker-controlled spillover into the upstream application stream
- CVE-2026-47778: Embedded NUL in TLS SAN Truncation, Auth Bypass
- CVE-2026-48042: Stack overflow in destructor of highly nested JSON
- CVE-2026-48090: OAuth2 filter late async token completion after stream teardown results in UAF/crash risk
- CVE-2026-48497: Abnormal process termination in DNS UDP filter
- CVE-2026-48743: HTTP/3 to HTTP/1 request smuggling via headers-only request with nonzero Content-Length
- CVE-2026-48706: Envoy Heap Buffer Overflow in TcpStatsdSink
- GHSA-p7c7-7c47-pwch: Denial-of-Service Attack Against the HTTP/3 Stack via QPACK Blocked Decoding
Upstream security fixes:
- CVE-2026-47261: wasm: bumped com_github_wasmtime to resolve CVE-2026-47261.
Behavior changes:
- build: disabled the contrib extension envoy.network.connection_balance.dlb (Intel DLB connection balancer) at the Bazel layer for all builds and platforms due to a breakage at the source archive. See https://github.com/envoyproxy/envoy/issues/45491 for local workarounds.

Docker images: https://hub.docker.com/r/envoyproxy/envoy/tags?page=1&name=v1.36.9 Docs: https://www.envoyproxy.io/docs/envoy/v1.36.9/ Release notes: https://www.envoyproxy.io/docs/envoy/v1.36.9/version_history/v1.36/v1.36.9 Full changelog: https://github.com/envoyproxy/envoy/compare/v1.36.8...v1.36.9

Signed-off-by: Greg Greenway ggreenway@apple.com Signed-off-by: Jonh Wendell jonh.wendell@redhat.com Signed-off-by: Kateryna Nezdolii kateryna.nezdolii@gmail.com Signed-off-by: Ryan Northey ryan@synca.io Signed-off-by: Boteng Yao boteng@google.com

Envoy v1.36.9