What is CVE-2026-3415?

CVE-2026-3415 is a high-severity vulnerability in Wso2 API Control Plane, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 8.7/10. Published 2026-08-06.

How severe is CVE-2026-3415?

High severity. CVSS v3 base score is 8.7 out of 10.

XXE in Wso2 API Control Plane

CVE-2026-3415

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.

Published 2026-08-06 · last modified 2026-08-31.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (41.9th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Wso2 API Control Plane — versions 4.5.0, 4.6.0
Wso2 API Manager — versions 0, 3.2.0, 3.2.1
Wso2 Carbon API Gateway — versions 6.7.206, 6.7.210, 9.20.74
Wso2 Carbon API Management Implementation — versions 6.7.206, 6.7.210, 9.20.74
Wso2 Traffic Manager — versions 4.5.0, 4.6.0
Wso2 Universal Gateway — versions 4.5.0, 4.6.0

Weakness classification (CWE)

CWE-776 — Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion)

References

ed10eef1-636d-4fbe-9993-6890dfa878f8 (vendor-advisory)

Frequently asked questions

What is CVE-2026-3415?: CVE-2026-3415 is a high-severity vulnerability in Wso2 API Control Plane, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 8.7/10. Published 2026-08-06.
How severe is CVE-2026-3415?: High severity. CVSS v3 base score is 8.7 out of 10.