---
id: CVE-2026-73553
title: >-
  Envoy is an open source edge and service proxy designed for cloud-native
  applications
summary: >-
  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 befo…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N'
cwe:
  - CWE-436
  - CWE-863
vendor: envoyproxy
product: envoy
affected:
  - envoy < 1.36.10
  - 'envoy >= 1.37.0, < 1.37.6'
  - 'envoy >= 1.38.0, < 1.38.4'
  - 'envoy >= 1.39.0, < 1.39.1'
patched:
  - openshift_service_mesh 3.0
  - openshift_service_mesh 3.1
  - openshift_service_mesh 3.2
  - openshift_service_mesh 3.3
  - openshift_service_mesh 3.4
published: '2026-09-21'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:43:37.403'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73553'
references:
  - url: >-
      https://github.com/envoyproxy/envoy/commit/0be4a0302ea94a894e470817c2edfbd5ed90d273
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/envoy/commit/6a703a375a20e3bf98140ee5f5522c614adee7b6
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/envoy/commit/b6ec9b66cc33a415e2fa81a6fa8363cac4772dd1
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/envoy/commit/e6d5fe885409ebb335ed3934a167f0bcfea471f2
    label: security-advisories@github.com
  - url: 'https://github.com/envoyproxy/envoy/releases/tag/v1.36.10'
    label: security-advisories@github.com
  - url: 'https://github.com/envoyproxy/envoy/releases/tag/v1.37.6'
    label: security-advisories@github.com
  - url: 'https://github.com/envoyproxy/envoy/releases/tag/v1.38.4'
    label: security-advisories@github.com
  - url: 'https://github.com/envoyproxy/envoy/releases/tag/v1.39.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73553.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-73553'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2512098'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-73553'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73553'
  - url: 'https://access.redhat.com/errata/RHSA-2026:65106'
  - url: 'https://access.redhat.com/errata/RHSA-2026:65112'
  - url: 'https://access.redhat.com/errata/RHSA-2026:65113'
  - url: 'https://access.redhat.com/errata/RHSA-2026:65115'
  - url: 'https://access.redhat.com/errata/RHSA-2026:65121'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.00517
epssPercentile: 0.41446
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-22T13:20:29.312691Z'
ingestedAt: '2026-09-21T20:52:58.301Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:65106** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.0 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65106)
- **RHSA-2026:65112** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.1 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65112)
- **RHSA-2026:65113** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.2 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65113)
- **RHSA-2026:65115** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.3 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65115)
- **RHSA-2026:65121** · Red Hat · fixed in: Red Hat OpenShift Service Mesh 3.4 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65121)