---
id: CVE-2026-4052
title: >-
  Privilege Escalation via Token Endpoint in WSO2 API Manager (APIM 4.x/IS as
  Resident Key Manager)
summary: >-
  This issue only impacts deployments where WSO2 Identity Server is configured
  as a Resident Key Manager with database sharing. In such environments, a
  self-registered user may gain access to the System REST APIs of WSO2 API
  Manager by obt…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-862
vendor: WSO2
product: WSO2 API Manager
affected:
  - api_manager 4.1.0
  - api_manager 4.2.0
  - api_manager 4.3.0
  - api_manager 4.4.0
  - api_manager 4.5.0
  - api_manager 4.6.0
  - api_control_plane 4.5.0
  - api_control_plane 4.6.0
  - 'org.wso2.km.ext.wso2is:wso2is.key.manager.core < 1.8.8'
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-11-03T20:08:03.683649Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T20:08:17.165Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-4052'
references:
  - url: >-
      https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5212/
tags:
  - cve.org
epss: 0.0036
epssPercentile: 0.29988
ingestedAt: '2026-11-05T20:33:06.429Z'
---

## Overview

This issue only impacts deployments where WSO2 Identity Server is configured as a Resident Key Manager with database sharing. In such environments, a self-registered user may gain access to the System REST APIs of WSO2 API Manager by obtaining a token from the WSO2 Identity Server token endpoint.

## Affected

- `api_manager 4.1.0`
- `api_manager 4.2.0`
- `api_manager 4.3.0`
- `api_manager 4.4.0`
- `api_manager 4.5.0`
- `api_manager 4.6.0`
- `api_control_plane 4.5.0`
- `api_control_plane 4.6.0`
- `org.wso2.km.ext.wso2is:wso2is.key.manager.core < 1.8.8`

## Remediation

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5212/#solution