---
id: CVE-2026-50572
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, Envoy's HTTP
  external-authorization client can retain a stale request callback after a
  request is reject…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-416
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-2026-50572'
references:
  - url: >-
      https://github.com/envoyproxy/envoy/commit/8dacef38337aeffd62866b5c5910104b63b33db8
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/envoy/commit/a49085623654e27e9ad6298928557644b849d7ce
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/envoy/commit/c1b29534a294cb0999e99e1fe0de000310165f03
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/envoy/commit/c524571ffad517ba650d9563f85afa89194e2cfb
    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-q8wp-gf7q-m8cv
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50572.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-50572'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2512091'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-50572'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50572'
  - 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
  - csaf
  - vex
  - red-hat
epss: 0.0068
epssPercentile: 0.50343
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-22T13:30:30.535577Z'
ingestedAt: '2026-09-21T19:51:58.874Z'
---

## 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, Envoy's HTTP external-authorization client can retain a stale request callback after a request is rejected. When RawHttpClientImpl::onSuccess later processes the authorization response, it can invoke callbacks_ after the callback owner has been destroyed, causing a use-after-free and process crash under production traffic. The relevant scope boundary is that the vulnerable path uses the HTTP ext_authz client; the advisory does not establish the same trigger for unrelated filters. 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)