CVE-2026-3415 HIGH

CVE-2026-3415: XML External Entity (XXE) Injection via Schema Validation in Multiple WSO2 Products Allows File Reading and Denial of Service

Vendor Wso2
Product WSO2 API Manager
Weakness CWE-776
Published August 6, 2026
Last update August 6, 2026

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H

What the vulnerability does

01Description

The XML and schema validation functionalities within the SchemaValidator Mediator process XML input as part of validation flows. Under certain conditions, the XML parser allows the resolution of external entities when handling user-supplied XML content during validation operations. This behavior can occur when an attacker supplies crafted XML payloads to the relevant mediator flows with sufficient privileges. Successful exploitation may allow a highly privileged actor to read files accessible within the server hosting the affected product. Additionally, it may be possible to trigger outbound requests to unintended internal or external locations, depending on the server environment and network configuration. Specially crafted XML payloads can also lead to excessive resource consumption during parsing, impacting the availability of the product.

Key dates

02Disclosure timeline

August 6, 2026 CVE published