WSO2 API Manager Event Publisher Output Adapter information disclosure

Summaryinfo

A vulnerability, which was classified as problematic, was found in WSO2 API Manager, API Control Plane, API Manager, Traffic Manager, Universal Gateway, Identity Server, Identity Server as Key Manager, Open Banking IAM, Open Banking AM and Carbon Event Publisher Core. The impacted element is an unknown function of the component Event Publisher Output Adapter. Such manipulation leads to information disclosure. This vulnerability is listed as CVE-2026-18800. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in WSO2 API Manager, API Control Plane, API Manager, Traffic Manager, Universal Gateway, Identity Server, Identity Server as Key Manager, Open Banking IAM, Open Banking AM and Carbon Event Publisher Core. Affected by this issue is some unknown functionality of the component Event Publisher Output Adapter. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

When an Event Publisher output adapter is configured with properties that are irrelevant to its function, the affected products log these irrelevant properties. This can inadvertently include sensitive user credentials or other confidential information depending on the nature of the misconfigured property. A malicious actor with access to the 'wso2carbon' log files could retrieve sensitive information logged by the system. This may potentially lead to unauthorized access if the logged data contains credentials or other critical secrets.

The advisory is shared for download at security.docs.wso2.com. This vulnerability is handled as CVE-2026-18800 since 08/04/2026. The exploitation is known to be easy. The attack needs to be approached locally. Additional levels of successful authentication are necessary for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-115114). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Banking Software

Vendor

• WSO2

Name

• API Control Plane
• API Manager
• API Manager
• Carbon Event Publisher Core
• Identity Server
• Identity Server as Key Manager
• Open Banking AM
• Open Banking IAM
• Traffic Manager
• Universal Gateway

License

• commercial

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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