CVE-2026-3415

High

Description

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.

SeverityHigh
CVSS8.7
Exploit probability—
ProductWSO2 API Manager
PublishedAug 6, 2026
First seenAug 6, 2026
Weakness typeCWE-776CWE-776

How to fix

Update
  • WSO2 WSO2 API Manager3.2.0.472, 3.2.1.91, 4.1.0.254, 4.2.0.194, 4.3.0.105, 4.4.0.68, 4.5.0.53, 4.6.0.16 or later
  • WSO2 WSO2 Universal Gateway4.5.0.53, 4.6.0.16 or later
  • WSO2 WSO2 Traffic Manager4.5.0.52, 4.6.0.16 or later
  • WSO2 WSO2 API Control Plane4.5.0.54, 4.6.0.17 or later
  • WSO2 WSO2 Carbon API Gateway6.7.206.594, 6.7.210.95, 9.20.74.398, 9.28.116.412, 9.29.120.228, 9.30.67.158, 9.31.86.147, 9.32.147.38 or later
  • WSO2 WSO2 Carbon API Management Implementation6.7.206.594, 6.7.210.95, 9.20.74.398, 9.28.116.412, 9.29.120.228, 9.30.67.158, 9.31.86.147, 9.32.147.38 or later

Affected products

ProductAffected versionsFixed in
WSO2 WSO2 API Manager3.2.0 ≤ v < 3.2.0.472, 3.2.1 ≤ v < 3.2.1.91, 4.1.0 ≤ v < 4.1.0.254, 4.2.0 ≤ v < 4.2.0.194, 4.3.0 ≤ v < 4.3.0.105, 4.4.0 ≤ v < 4.4.0.68, 4.5.0 ≤ v < 4.5.0.53, 4.6.0 ≤ v < 4.6.0.163.2.0.472, 3.2.1.91, 4.1.0.254, 4.2.0.194, 4.3.0.105, 4.4.0.68, 4.5.0.53, 4.6.0.16
WSO2 WSO2 Universal Gateway4.5.0 ≤ v < 4.5.0.53, 4.6.0 ≤ v < 4.6.0.164.5.0.53, 4.6.0.16
WSO2 WSO2 Traffic Manager4.5.0 ≤ v < 4.5.0.52, 4.6.0 ≤ v < 4.6.0.164.5.0.52, 4.6.0.16
WSO2 WSO2 API Control Plane4.5.0 ≤ v < 4.5.0.54, 4.6.0 ≤ v < 4.6.0.174.5.0.54, 4.6.0.17
WSO2 WSO2 Carbon API Gateway6.7.206 ≤ v < 6.7.206.594, 6.7.210 ≤ v < 6.7.210.95, 9.20.74 ≤ v < 9.20.74.398, 9.28.116 ≤ v < 9.28.116.412, 9.29.120 ≤ v < 9.29.120.228, 9.30.67 ≤ v < 9.30.67.158, 9.31.86 ≤ v < 9.31.86.147, 9.32.147 ≤ v < 9.32.147.386.7.206.594, 6.7.210.95, 9.20.74.398, 9.28.116.412, 9.29.120.228, 9.30.67.158, 9.31.86.147, 9.32.147.38
WSO2 WSO2 Carbon API Management Implementation6.7.206 ≤ v < 6.7.206.594, 6.7.210 ≤ v < 6.7.210.95, 9.20.74 ≤ v < 9.20.74.398, 9.28.116 ≤ v < 9.28.116.412, 9.29.120 ≤ v < 9.29.120.228, 9.30.67 ≤ v < 9.30.67.158, 9.31.86 ≤ v < 9.31.86.147, 9.32.147 ≤ v < 9.32.147.386.7.206.594, 6.7.210.95, 9.20.74.398, 9.28.116.412, 9.29.120.228, 9.30.67.158, 9.31.86.147, 9.32.147.38

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