CVE-2026-47221— Envoy Proxy Envoy 异常处理不当漏洞

Envoy: Null pointer deref in internal redirects

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.18.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, the router filter contains a null pointer dereference vulnerability when handling HTTP 303 (See Other) internal redirects for body-less non-GET/HEAD requests. When a POST, PUT, DELETE, or PATCH request without a body is sent to a route configured with internal redirect policy that includes 303 in redirect_response_codes, and the upstream responds with HTTP 303, the redirect handling code attempts to drain a request body buffer that was never allocated. This results in a segmentation fault that crashes the entire Envoy process. When route configured with internal_redirect_policy including 303 in redirect_response_codes and upstream must return HTTP 303 response, an unauthenticated attacker can exploit this to cause complete denial of service, terminating all active connections. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

空指针解引用

Envoy Proxy Envoy 异常处理不当漏洞

Envoy Proxy Envoy是Envoy Proxy团队的应用网关。 Envoy Proxy Envoy存在异常处理不当漏洞，该漏洞源于路由过滤器中的空指针取消引用，可能导致未经身份验证的攻击者通过HTTP 303内部重定向，造成拒绝服务，中断所有活动连接。以下版本受到影响：1.35.13版本之前版本、1.36.9版本之前版本、1.37.5版本之前版本和1.38.3版本之前版本。

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