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.

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History

Tue, 06 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*

Thu, 24 Sep 2026 04:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 21 Sep 2026 20:00:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE. 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.
Title envoy: envoy: ext_authz crash on CONNECT requests without :path pseudo-header Envoy ext_authz: request `:path` pseudoheader dereferenced w/o null check
Weaknesses CWE-20
References

Wed, 02 Sep 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Envoyproxy
Envoyproxy envoy
Vendors & Products Envoyproxy
Envoyproxy envoy

Tue, 01 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE.
Title envoy: envoy: ext_authz crash on CONNECT requests without :path pseudo-header
Weaknesses CWE-476
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-22T15:39:45.625Z

Reserved: 2026-08-12T20:53:46.379Z

Link: CVE-2026-73547

cve-icon Vulnrichment

Updated: 2026-09-22T14:15:39.917Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-21T20:17:28.230

Modified: 2026-10-06T15:34:36.113

Link: CVE-2026-73547

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-26T13:00:00Z

Links: CVE-2026-73547 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T22:00:10Z

Weaknesses