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TI-2026-84166 Aliases CVE-2026-4052GHSA-w63q-qmf7-22jw

Privilege escalation via token endpoint in WSO2 API Manager

Priority MEDIUM 49CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

WSO2 API Manager from 4.1.0, WSO2 API Control Plane from 4.5.0, and the WSO2 Identity Server Key Manager Connector (apim-km-wso2is) before 1.8.8 are affected. The flaw is missing authorization (CWE-862) in deployments where WSO2 Identity Server is the Resident Key Manager with database sharing. A self-registered user can obtain a token from the Identity Server token endpoint and gain access to the System REST APIs of WSO2 API Manager.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0036 30th percentileScored 2026-11-07
Fix Fixed WSO2 Identity Server Key Manager Connector (apim-km-wso2is) (WSO2): 1.8.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WSO2WSO2 API Manager4.1.0; 4.2.0; 4.3.0; 4.4.0; 4.5.0; 4.6.0—No fix listedCNA
WSO2WSO2 API Control Plane4.5.0; 4.6.0—No fix listedCNA
WSO2WSO2 Identity Server Key Manager Connector (apim-km-wso2is)before 1.8.81.8.8Patch availableCNA
  • WSO2 API Manager VendorWSO2 Affected 4.1.0; 4.2.0; 4.3.0; 4.4.0; 4.5.0; 4.6.0 Fixed in — No fix listed CNA
  • WSO2 API Control Plane VendorWSO2 Affected 4.5.0; 4.6.0 Fixed in — No fix listed CNA
  • WSO2 Identity Server Key Manager Connector (apim-km-wso2is) VendorWSO2 Affected before 1.8.8 Fixed in 1.8.8 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*——WSO2
  • cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* Versions — — ·WSO2

Remediation

Update the WSO2 Identity Server Key Manager Connector (apim-km-wso2is) to version 1.8.8. No fixed version is listed for WSO2 API Manager or WSO2 API Control Plane.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA WSO2 Identity Server Key Manager Connector (apim-km-wso2is) (WSO2) Fixed in 1.8.8

Timeline

  1. 2026-11-03 Threatist record created from CVE-2026-4052
  2. 2026-11-03 Alias added: GHSA-w63q-qmf7-22jw
  3. 2026-11-03 CISA SSVC decision points changed

References

Advisory 1

  • TI-2026-04755 Authentication Bypass via JWT Algorithm Mismatch in Multiple WSO2 Products Allows Account Takeover KEVCVSS 3.1CRITICAL 10.0
  • TI-2022-11928 Certain WSO2 products allow unrestricted file upload with resultant remote code execution. KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-18808 An issue was discovered in WSO2 Enterprise Integrator 6.4.0. CVSS 3.1MEDIUM 6.1
  • TI-2020-15069 The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0… CVSS 3.1CRITICAL 9.1
  • TI-2023-15163 A reflected cross-site scripting (XSS) vulnerability in /authenticationendpoint/login.do… CVSS 3.1MEDIUM 6.1
  • TI-2022-04130 WSO2 carbon-registry Advanced Search advancedSearchForm-ajaxprocessor.jsp cross site scripting CVSS 3.1MEDIUM 6.1
See all 186 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences