CVE-2025-54588

Envoy DNS cache use-after-free in the Dynamic Forward Proxy (DFP) → triggers when a DNS resolution callback fires new resolutions or cancels existing ones, under specific conditions (DFP-enabled, envoy.reloadable_features.dfp_cluster_resolves_hosts enabled, and Host header modified between Dynami...

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-2026-47207

CVE-2026-47207 : Envoy crashes when an ext_proc server sends a single gRPC message containing multiple ProcessingResponse messages, leading to a use-after-free during processing of subsequent responses. Affected: Envoy versions 1.34.0 through 1.35.12 (as 1.35.13 fixes the issue) and 1.36.0–1.36.8...

CVE-2026-47692

Envoy vulnerability CVE-2026-47692: PROXY Protocol v2 header generator can emit TLVs beyond the maximum 65535-byte length, causing a mismatch between bytes written and the length field and potentially smuggling bytes upstream. Affected versions: 1.34.0 through 1.35.13, 1.36.9, 1.37.5, and 1.38.3....

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-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-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-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-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...

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...