CVE-2026-47221: Envoy Cve 2026 47221 Null Deref Redirect
Envoy is vulnerable to a null pointer dereference when handling HTTP 303 (See Other) internal redirects for body-less non-GET/HEAD requests. The router unconditionally attempts to drain the request body decoding buffer, which is never allocated for requests without a body. This leads to a denial of service crash. Checking if the decoding buffer exists is req
C++greprules fetch cve-2026-47221-envoy-cve-2026-47221-null-deref-redirect --engine opengrepDescription
Envoy is vulnerable to a null pointer dereference when handling HTTP 303 (See Other) internal redirects for body-less non-GET/HEAD requests. The router unconditionally attempts to drain the request body decoding buffer, which is never allocated for requests without a body. This leads to a denial of service crash. Checking if the decoding buffer exists is req
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