Vulnerability Database

383,304

Total vulnerabilities in the database

CVE-2026-3415 — wso2 / wso2_api_manager

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

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: Aug 6, 2026
  • Updated: Sep 13, 2026
  • CVE: CVE-2026-3415
  • Severity: High
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: High
  • Score: 8.7
  • AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H
Software Affected versions
wso2 / wso2_api_manager >= 3.2.0, < 3.2.0.472
wso2 / wso2_api_manager >= 3.2.1, < 3.2.1.91
wso2 / wso2_api_manager >= 4.1.0, < 4.1.0.254
wso2 / wso2_api_manager >= 4.2.0, < 4.2.0.194
wso2 / wso2_api_manager >= 4.3.0, < 4.3.0.105
wso2 / wso2_api_manager >= 4.4.0, < 4.4.0.68
wso2 / wso2_api_manager >= 4.5.0, < 4.5.0.53
wso2 / wso2_api_manager >= 4.6.0, < 4.6.0.16
wso2 / wso2_universal_gateway >= 4.5.0, < 4.5.0.53
wso2 / wso2_universal_gateway >= 4.6.0, < 4.6.0.16
wso2 / wso2_traffic_manager >= 4.5.0, < 4.5.0.52
wso2 / wso2_traffic_manager >= 4.6.0, < 4.6.0.16
wso2 / wso2_api_control_plane >= 4.5.0, < 4.5.0.54
wso2 / wso2_api_control_plane >= 4.6.0, < 4.6.0.17
wso2 / wso2_carbon_api_gateway >= 6.7.206, < 6.7.206.594
wso2 / wso2_carbon_api_gateway >= 6.7.210, < 6.7.210.95
wso2 / wso2_carbon_api_gateway >= 9.20.74, < 9.20.74.398
wso2 / wso2_carbon_api_gateway >= 9.28.116, < 9.28.116.412
wso2 / wso2_carbon_api_gateway >= 9.29.120, < 9.29.120.228
wso2 / wso2_carbon_api_gateway >= 9.30.67, < 9.30.67.158
wso2 / wso2_carbon_api_gateway >= 9.31.86, < 9.31.86.147
wso2 / wso2_carbon_api_gateway >= 9.32.147, < 9.32.147.38
wso2 / wso2_carbon_api_management_implementation >= 6.7.206, < 6.7.206.594
wso2 / wso2_carbon_api_management_implementation >= 6.7.210, < 6.7.210.95
wso2 / wso2_carbon_api_management_implementation >= 9.20.74, < 9.20.74.398
wso2 / wso2_carbon_api_management_implementation >= 9.28.116, < 9.28.116.412
wso2 / wso2_carbon_api_management_implementation >= 9.29.120, < 9.29.120.228
wso2 / wso2_carbon_api_management_implementation >= 9.30.67, < 9.30.67.158
wso2 / wso2_carbon_api_management_implementation >= 9.31.86, < 9.31.86.147
wso2 / wso2_carbon_api_management_implementation >= 9.32.147, < 9.32.147.38

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.