# CVE-2026-18800: WSO2 products sensitive information disclosure in Event Publisher logs

Source: https://junglewise.ai/threats/cve-2026-18800-when-an-event-publisher-output-adapter-is-configured-with  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-02. Updated: 2026-11-02  
License: CC BY 4.0 with a link back

CVE-2026-18800 · Severity: medium · CVSS 4.4 · Published 2026-11-02

WSO2's API management, identity, and integration products inadvertently log sensitive user credentials and secrets when Event Publisher adapters are misconfigured with irrelevant properties. An attacker with access to the product's log files could extract these credentials to gain unauthorized access to systems and accounts.

Technologies: [Wso2 API Control Plane](https://junglewise.ai/threats/technologies/api-control-plane), [Wso2 API Manager](https://junglewise.ai/threats/technologies/api-manager), [Wso2 Identity Server](https://junglewise.ai/threats/technologies/identity-server), [Wso2 Identity Server as Key Manager](https://junglewise.ai/threats/technologies/identity-server-as-key-manager), [Wso2 Open Banking AM](https://junglewise.ai/threats/technologies/open-banking-am), [Wso2 Open Banking IAM](https://junglewise.ai/threats/technologies/open-banking-iam), [Wso2 Traffic Manager](https://junglewise.ai/threats/technologies/traffic-manager), [Wso2 Universal Gateway](https://junglewise.ai/threats/technologies/universal-gateway). Vendors: [Wso2](https://junglewise.ai/threats/vendors/wso2).

## Quick answers

**Is CVE-2026-18800 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18800 being exploited in the wild.

**How severe is CVE-2026-18800?** Medium severity, with a CVSS score of 4.4, published 2 November 2026.

**Which products and versions are affected?** Wso2 API Control Plane 4.6.0, 4.5.0; Wso2 API Manager 4.6.0, 4.5.0, 4.4.0, 4.3.0, 4.2.0, 4.1.0, 3.2.1, 3.2.0, 3.1.0; Wso2 Identity Server 7.2.0, 7.1.0, 7.0.0, 6.1.0, 6.0.0, 5.11.0, 5.10.0; Wso2 Identity Server as Key Manager 5.10.0; and 4 more.

**Is there a fix for CVE-2026-18800?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-18800 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-18800?** Check whether you run Wso2 API Control Plane, Wso2 API Manager, Wso2 Identity Server or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Event Publisher output adapter in affected WSO2 products logs misconfigured irrelevant properties without filtering, resulting in plaintext credentials or secrets appearing in log files. The vulnerability requires local access to 'wso2carbon' log files and high privilege context (HR requirement per CVSS). Community users can apply the fix from the referenced GitHub PR; subscription holders should apply specified update levels.

## Affected products

- WSO2 API Control Plane 4.6.0, 4.5.0
- WSO2 API Manager 4.6.0, 4.5.0, 4.4.0, 4.3.0, 4.2.0, 4.1.0, 3.2.1, 3.2.0, 3.1.0
- WSO2 Identity Server as Key Manager 5.10.0
- WSO2 Identity Server 7.2.0, 7.1.0, 7.0.0, 6.1.0, 6.0.0, 5.11.0, 5.10.0
- WSO2 Open Banking AM 2.0.0
- WSO2 Open Banking IAM 2.0.0
- WSO2 Traffic Manager 4.6.0, 4.5.0
- WSO2 Universal Gateway 4.6.0, 4.5.0

## Timeline

- 2026-05-03: advisory
- 2026-11-02: disclosed

## References

- [https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4897/](https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4897/)

## Related threats

- [WSO2 Identity Server privilege escalation via client credentials grant type](https://junglewise.ai/threats/cve-2025-11229-the-system-fails-to-properly-enforce-scope-authorization-when-the)
- [WSO2 Identity Server privilege escalation via shared database](https://junglewise.ai/threats/cve-2026-4052-this-issue-only-impacts-deployments-where-wso2-identity-server-is)
- [WSO2 Access token issuance without IDP status validation](https://junglewise.ai/threats/cve-2025-1397-when-utilizing-jwt-bearer-or-saml2-bearer-grant-types-the-system)
- [WSO2 API Manager Admin REST API SQL injection](https://junglewise.ai/threats/cve-2026-2613-the-admin-rest-api-accepts-user-supplied-input-without-adequately)
- [WSO2 API Manager SVG upload stored XSS in Publisher portal](https://junglewise.ai/threats/cve-2025-12544-the-publisher-portal-fails-to-enforce-proper-validation-on)