CVE-2026-73553

Published Sep 21, 2026

Last updated 16 days ago

Overview

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, When ignore_path_parameters_in_path_matching is enabled, Envoy's router strips the semicolon suffix before matching but the RBAC url_path matcher evaluates the raw path. A downstream request such as /admin;x can therefore miss a DENY rule for /admin while the router still selects the protected /admin backend. The inconsistent canonicalization allows an unauthenticated client to bypass path-based authorization. The relevant scope boundary is that the route option and a path-based RBAC rule must both be present, and the protected route must match after stripping. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Source
security-advisories@github.com
NVD status
Analyzed
Products
envoy

Risk scores

CVSS 3.1

Type
Secondary
Base score
7.5
Impact score
4.7
Exploitability score
2.2
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Severity
HIGH

Weaknesses

security-advisories@github.com
CWE-436

Social media

Hype score
Not currently trending

Configurations