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CVE-2026-73512— Envoy: use-after-free in QUIC on internal redirects

一分钟漏洞结论

影响对象
envoyproxy envoy
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HttpDatagramHandler caches the current RequestDecoder when Capsule Protocol is enabled. Stream recreation, including an

CVSS 7.5 · High EPSS 0.83% · P56
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一、 漏洞 CVE-2026-73512 基础信息

漏洞信息

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Vulnerability Title
Envoy: use-after-free in QUIC on internal redirects
来源: CVE Program / CVE List V5
Vulnerability Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HttpDatagramHandler caches the current RequestDecoder when Capsule Protocol is enabled. Stream recreation, including an internal redirect, replaces the ActiveStream and updates EnvoyQuicServerStream but does not update the handler's cached pointer. A subsequent HTTP/3 datagram can call decodeData through the freed decoder, causing invalid virtual dispatch and a process crash. The relevant scope boundary is that hTTP/3 datagrams and Capsule Protocol must be enabled, and the request must enter a stream-recreation path such as an internal redirect. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
释放后使用
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
envoyproxy envoy < 1.36.10 -

二、漏洞 CVE-2026-73512 的公开POC

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三、漏洞 CVE-2026-73512 的情报信息

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CVE-2026-73512 补丁与修复 (4)

CVE-2026-73512 其他参考 (1)

CVE-2026-73512 其他参考 (4)

同批安全公告 · envoyproxy · 2026-09-21 · 共 13 条

CVE-2026-73550 7.5 HIGH Envoy: HTTP/2 Discarded Host Header 200 GB Header-Copy OOM in Envoy
CVE-2026-73553 7.5 HIGH Envoy: RBAC Authorization Bypass via Path Parameters
CVE-2026-73513 7.5 HIGH Envoy: oghttp2 upstream trailers incorrect handling
CVE-2026-73548 7.5 HIGH Envoy: Cross-user response poisoning via a generic (non-WebSocket) HTTP upgrade on Envoy's
CVE-2026-73547 7.5 HIGH Envoy ext_authz: request `:path` pseudoheader dereferenced w/o null check
CVE-2026-73552 7.5 HIGH Envoy: HTTP RBAC safe_regex can fail open on RFC-valid obs-text header values
CVE-2026-73546 7.4 HIGH Envoy: Stored XSS in Admin Stats Interface (/stats?format=html)
CVE-2026-48521 5.9 MEDIUM Envoy: HTTP/3 connection pool selection null-derefs in ProdClusterManagerFactory::allocate
CVE-2026-50572 5.9 MEDIUM Envoy: ext_authz - RawHttpClientImpl onSuccess 0x0 segfault
CVE-2026-73511 5.3 MEDIUM Envoy: Potential path-matching/authentication bypass when using Envoy in combination with
CVE-2026-73549 5.3 MEDIUM Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IP
CVE-2026-73551 5.3 MEDIUM Envoy: Path normalization does not handle dot and dotdot segments with parameters

IV. Related Vulnerabilities

Same product: envoy
Same vendor: envoyproxy
Same weakness: CWE-416

V. Comments for CVE-2026-73512

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