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No exploitation reportedAwaiting NVD analysis

CVE-2026-4052

Privilege Escalation via Token Endpoint in WSO2 API Manager (APIM 4.x/IS as Resident Key Manager)

No exploitation reported by the sources we read.

  • Published2026-11-03
  • WeaknessCWE-862

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-11-0308:02CVE publishedCNA

Observed activity

isMalicious corpus · updated 2026-11-03 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-4052?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-4052?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

Products declared by the CNA

As WSO2, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • WSO2 API Managerother versions: not affected
    Affected
    • = 4.1.0no fix statedcustom
    • = 4.2.0no fix statedcustom
    • = 4.3.0no fix statedcustom
    • = 4.4.0no fix statedcustom
    • = 4.5.0no fix statedcustom
    • = 4.6.0no fix statedcustom
  • WSO2 API Control Planeother versions: not affected
    Affected
    • = 4.5.0no fix statedcustom
    • = 4.6.0no fix statedcustom
  • WSO2 Identity Server Key Manager Connector (apim-km-wso2is)other versions: not affected

    package org.wso2.km.ext.wso2is:wso2is.key.manager.core

    Affected
    • < 1.8.8fixed in 1.8.8custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-03

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-4052 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-11-03
  • CNACVSS 3.19.82026-11-03
  • CNAweakness (CWE)CWE-8622026-11-03

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-11-03
Last Modified
2026-11-03
NVD status
Received

Frequently asked questions

What is CVE-2026-4052?

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.

Is CVE-2026-4052 actively exploited?

Active exploitation of CVE-2026-4052 has not been confirmed.

What is the CVSS score for CVE-2026-4052?

CVE-2026-4052 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record