CVE-2026-50572

Envoy 's HTTP ext_authz client (specifically RawHttpClientImpl::onSuccess) is vulnerable to a use-after-free when a stale request callback is retained after a request is rejected. When the callback owner is destroyed but onSuccess later invokes callbacks_, the proxy process crashes under producti...

CVE-2025-64763

Envoy CVE-2025-64763 relates to a de-synchronization risk in TCP proxy mode where Envoy may accept client data for CONNECT requests before sending a 2xx response, and then forward that data to the upstream connection. If the upstream proxy returns a non‑2xx status, the CONNECT tunnel state can be...

CVE-2026-73511

Envoy (open source edge and service proxy) contains a path-matching/authentication bypass in versions prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1 . The root cause is a mismatch in how per-segment matrix parameters (semicolon-delimited) are handled: Envoy matches the raw request path, while servl...

CVE-2025-64527

Envoy vulnerability CVE-2025-64527: In versions 1.33.12, 1.34.10, 1.35.6, 1.36.2 and earlier, a re-entry bug in JwksFetcherImpl triggers a crash when JWT authentication uses remote JWKS with allow_missing_or_failed and multiple tokens in headers if the JWKS fetch fails. The first token’s JWKS fet...

CVE-2026-73549

CVE-2026-73549 is an incomplete fix for CVE-2026-26310 in Envoy (versions prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1). The Utility::copyInternetAddressAndPort and QUIC client-address paths reconstruct scoped IPv6 addresses via addressAsString and Ipv6Instance, producing a string with a percent ...

CVE-2026-73551

Envoy is an open-source edge and service proxy for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1 , its URL normalization does not recognize dot and dotdot path segments carrying semicolon parameters . A request such as /user/..;foo=bar/admin is not canonicalized to /admi...

CVE-2026-26330

CVE-2026-26330 affects Envoy prior to versions 1.37.1, 1.36.5, 1.35.8, and 1.34.13. The issue occurs in the rate limit filter when the response phase limit is enabled and the response phase limit request fails directly, causing a crash due to access to an inner state that is not cleaned up after ...

CVE-2025-55162

CVE-2025-55162 affects Envoy (OAuth2 filter). The issue is insufficient Session Expiration: when cookie names are __Secure- or __Host-, the filter fails to add the Secure attribute to the Set-Cookie header during deletion, causing cookies to persist and enabling session hijacking on shared machin...

CVE-2025-62504

Envoy Lua filter use-after-free is fixed in versions 1.36.2, 1.35.6, 1.34.10, and 1.33.12. The vulnerability occurs when a Lua script rewriting the response body causes the size to exceed per_connection_buffer_limit_bytes, leading to a local reply that can override headers and crash the process, ...

CVE-2025-66220

Envoy vulnerability CVE-2025-66220: Envoy’s mTLS certificate matcher for match_typed_subject_alt_names may incorrectly treat certificates containing an embedded null byte inside an OTHERNAME SAN value as valid matches. Affected versions include 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier. Descr...

CVE-2026-26309

Envoy CVE-2026-26309 describes an off-by-one write in Envoy::JsonEscaper::escapeString() that can corrupt std::string null-termination, causing undefined behavior and potentially crashes or out-of-bounds reads when treated as a C-string. Affected before 1.37.1, 1.36.5, 1.35.8, 1.34.13. The vulner...

CVE-2026-73548

CVE-2026-73548 affects Envoy (open source edge/service proxy) prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1 . The root cause is that Envoy forwards data for a configured non-WebSocket HTTP upgrade before the upstream accepts it. An unauthenticated HTTP/2 client can smuggle a complete HTTP/1.1 requ...

CVE-2026-26308

Envoy CVE-2026-26308 affects the Envoy RBAC filter. The issue arises from how multiple HTTP header values are validated: instead of validating each value separately, Envoy concatenates all values into a single comma-separated string, allowing bypass of Deny rules under RBAC. Affects versions prio...

CVE-2025-62409

CVE-2025-62409 affects Envoy, where large requests/responses can trigger TCP connection pool crashes due to flow-control handling when the connection is closing but upstream data still arrives, causing a buffer watermark callback nullptr reference. Affected products include the Envoy core with TC...

CVE-2026-26311

CVE-2026-26311 affects Envoy releases prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13. The issue is a logic vulnerability in the HTTP connection manager (FilterManager) where, after an HTTP/2 stream reset, the code may invoke filter callbacks on a stream that is already logically cleaned up, creatin...