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 ext_authz filter assumes that a request contains a :path pseudoheader when applying query_parameters_to_set or query_parameters_to_remove from an authorization response. A path-less CONNECT request makes request_headers_->Path() return null, and Filter::onComplete dereferences that pointer while parsing the query string. An unauthenticated downstream client can crash the Envoy process when the filter and authorization response use query-parameter mutation. The relevant scope boundary is that the deployment must accept path-less CONNECT and configure ext_authz query-parameter mutation. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Affected products
envoyproxy: envoy
References9
- github.com/envoyproxy/envoy/security/advisories/GHSA-87ph-jqwm-… ExploitVendor Advisory
- github.com/envoyproxy/envoy/commit/064af2e61d0d1c421490d9e3e6e6… Patch
- github.com/envoyproxy/envoy/commit/5f3b8e9b2b8a787a63202d35bb38… Patch
- github.com/envoyproxy/envoy/commit/838f8ffd9d7b5217682a22ee3347… Patch
- github.com/envoyproxy/envoy/commit/c3170d7c747e51bb8254378ea89a… Patch
- github.com/envoyproxy/envoy/releases/tag/v1.36.10 Release Notes
- github.com/envoyproxy/envoy/releases/tag/v1.37.6 Release Notes
- github.com/envoyproxy/envoy/releases/tag/v1.38.4 Release Notes
- github.com/envoyproxy/envoy/releases/tag/v1.39.1 Release Notes
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 46 · as of 8 November 2026
- CWE
- CWE-20CWE-476
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