# CVE-2026-18800: Information Disclosure via Event Publisher Logging in Multiple WSO2 Products Allows Retrieval of Sensitive Data

Status: published. Published: 2026-11-02. Updated: 2026-11-02.

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.

## Remediation

- fix: Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4897/#solution (source: CNA: WSO2)

## Affected products and versions

- WSO2 / WSO2 API Manager: ≥ 0; < 3.1.0 (unknown, custom); ≥ 3.1.0; < 3.1.0.357 (affected, custom); ≥ 3.2.0; < 3.2.0.465 (affected, custom); ≥ 3.2.1; < 3.2.1.84 (affected, custom); ≥ 4.1.0; < 4.1.0.249 (affected, custom); ≥ 4.2.0; < 4.2.0.189 (affected, custom); ≥ 4.3.0; < 4.3.0.100 (affected, custom); ≥ 4.4.0; < 4.4.0.64 (affected, custom); ≥ 4.5.0; < 4.5.0.49 (affected, custom); ≥ 4.6.0; < 4.6.0.13 (affected, custom). Source: CNA: WSO2
- WSO2 / WSO2 Traffic Manager: ≥ 0; < 4.5.0 (unknown, custom); ≥ 4.5.0; < 4.5.0.48 (affected, custom); ≥ 4.6.0; < 4.6.0.13 (affected, custom). Source: CNA: WSO2
- WSO2 / WSO2 API Control Plane: ≥ 0; < 4.5.0 (unknown, custom); ≥ 4.5.0; < 4.5.0.50 (affected, custom); ≥ 4.6.0; < 4.6.0.14 (affected, custom). Source: CNA: WSO2
- WSO2 / WSO2 Universal Gateway: ≥ 0; < 4.5.0 (unknown, custom); ≥ 4.5.0; < 4.5.0.49 (affected, custom); ≥ 4.6.0; < 4.6.0.13 (affected, custom). Source: CNA: WSO2
- WSO2 / WSO2 Identity Server: ≥ 0; < 5.10.0 (unknown, custom); ≥ 5.10.0; < 5.10.0.386 (affected, custom); ≥ 5.11.0; < 5.11.0.433 (affected, custom); ≥ 6.0.0; < 6.0.0.260 (affected, custom); ≥ 6.1.0; < 6.1.0.261 (affected, custom); ≥ 7.0.0; < 7.0.0.139 (affected, custom); ≥ 7.1.0; < 7.1.0.47 (affected, custom); ≥ 7.2.0; < 7.2.0.8 (affected, custom). Source: CNA: WSO2
- WSO2 / WSO2 Identity Server as Key Manager: ≥ 0; < 5.10.0 (unknown, custom); ≥ 5.10.0; < 5.10.0.377 (affected, custom). Source: CNA: WSO2
- WSO2 / WSO2 Open Banking IAM: ≥ 0; < 2.0.0 (unknown, custom); ≥ 2.0.0; < 2.0.0.426 (affected, custom). Source: CNA: WSO2
- WSO2 / WSO2 Open Banking AM: ≥ 0; < 2.0.0 (unknown, custom); ≥ 2.0.0; < 2.0.0.406 (affected, custom). Source: CNA: WSO2
- WSO2 / WSO2 Carbon Event Publisher Core (org.wso2.carbon.analytics-common:org.wso2.carbon.event.publisher.core): ≥ 0; < 5.2.65 (affected, custom); ≥ 5.3.0; < 5.3.28 (affected, custom). Source: CNA: WSO2

## Severity and prioritization

- CVSS 3.1: 4.4 (medium); CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N; source: CNA: WSO2

- CVSS 3.1: 4.4 (medium); CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N; source: NVD: ed10eef1-636d-4fbe-9993-6890dfa878f8

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-532

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4897/ (CNA: WSO2; vendor-advisory)

- https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4897/ (ed10eef1-636d-4fbe-9993-6890dfa878f8)

## Provenance

- CNA: WSO2: https://www.cve.org/CVERecord?id=CVE-2026-18800; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18800; retrieved 2026-11-02; source updated 2026-11-02

Revision: cc102190987f0784ae8df417fefd1edf4ff13c85a0dea88cac1369d9c7ae9407

Canonical: https://y2.dev/cve/CVE-2026-18800