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VulnerabilityPublished

CVE-2026-4052: This issue only impacts deployments where WSO2 Identity Server is configured as a Resident Key Manager

Source GCVE Database

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Authoritative record:CVE-2026-4052· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical : upgrade to 1.8.8 as a priority.

Data as of 3 Nov 2026, 10:43 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (WSO2)CVSS 3.19.8
Patch
Available – fixed in 1.8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

What to do

Upgrade WSO2 Identity Server Key Manager Connector (apim-km-wso2is) and org.wso2/carbon-apimgt to 1.8.8.

Affected software

ProductAffectedFixed in
WSO2WSO2 API ManagerAffected
  • 4.1.0 – 4.6.0
6 affected builds
Fixed in–
WSO2WSO2 API Control PlaneAffected
  • =4.5.0
  • =4.6.0
Fixed in–
WSO2 Identity Server Key Manager Connector (apim-km-wso2is)org.wso2.km.ext.wso2is:wso2is.key.manager.coreAffected
  • <1.8.8
Fixed in
  • 1.8.8
Mavenorg.wso2/carbon-apimgtpkg:maven/org.wso2/carbon-apimgtOther threatsAffected
  • 4.1.0 – 4.6.0
  • <1.8.8
6 affected builds
Fixed in
  • 1.8.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, organizations should review their deployment configurations, especially the use of WSO2 Identity Server as a Resident Key Manager with database sharing, and consider restricting self-registration or access to token endpoints as a temporary mitigation.

Description

CVE-2026-4052 affects deployments where WSO2 Identity Server is configured as a Resident Key Manager with database sharing. In these environments, a self-registered user can obtain a token from the WSO2 Identity Server token endpoint and use it to access the System REST APIs of WSO2 API Manager. This vulnerability has a critical severity with a CVSS score of 9.8, indicating high impact on confidentiality, integrity, and availability.

References

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