CVE-2026-3415 — HIGH (8.7) — White Hats Nepal

Vulnerability 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.

CVSS Score

8.7

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-776

References

https://security.docs.wso2.com/en/latest/security-announcements/security-advisor

FAQ

What is CVE-2026-3415?

CVE-2026-3415 is a vulnerability with a CVSS score of 8.7 (HIGH). 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 exter...

How severe is CVE-2026-3415?

CVE-2026-3415 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-3415?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.