# CVE-2026-4103

## Summary

- **CVE ID:** CVE-2026-4103
- **Severity:** MEDIUM
- **CVSS Score:** 6.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **CWE:** CWE-79
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 14, 2026

## Description

Insufficient HTML sanitization in the Publisher Portal and Developer Portal allows untrusted user input to be rendered without proper encoding or neutralization. This enables the injection and execution of malicious JavaScript when affected API documents are viewed.

Successful exploitation may result in the execution of malicious scripts within the user's browser context when viewing API documentation. Users with permissions to access the API documentation through these portals may be impacted, potentially allowing attackers to perform actions on behalf of the user, depending on their session privileges.

## Affected Products

- WSO2 — WSO2 API Control Plane (4.5.0)
- WSO2 — WSO2 API Control Plane (4.6.0)
- WSO2 — WSO2 API Manager (0)
- WSO2 — WSO2 API Manager (3.2.0)
- WSO2 — WSO2 API Manager (3.2.1)
- WSO2 — WSO2 API Manager (4.1.0)
- WSO2 — WSO2 API Manager (4.2.0)
- WSO2 — WSO2 API Manager (4.3.0)
- WSO2 — WSO2 API Manager (4.4.0)
- WSO2 — WSO2 API Manager (4.5.0)
- WSO2 — WSO2 API Manager (4.6.0)

## References

- [CNA](https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-4844/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.18%
- **EPSS Percentile:** 7.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._