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CVE-2026-3415

HIGHCVSS 8.7/10EPSS 0.34%

Last modified

CVE-2026-3415 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.7/10

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

EPSS Probability
0.34%

26.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
WSO2WSO2 API Manager< 3.2.0; >= 3.2.0, < 3.2.0.472; >= 3.2.1, < 3.2.1.91; >= 4.1.0, < 4.1.0.254; >= 4.2.0, < 4.2.0.194; >= 4.3.0, < 4.3.0.105; >= 4.4.0, < 4.4.0.68; >= 4.5.0, < 4.5.0.53; >= 4.6.0, < 4.6.0.16
WSO2WSO2 Universal Gateway>= 4.5.0, < 4.5.0.53; >= 4.6.0, < 4.6.0.16
WSO2WSO2 Traffic Manager>= 4.5.0, < 4.5.0.52; >= 4.6.0, < 4.6.0.16
WSO2WSO2 API Control Plane>= 4.5.0, < 4.5.0.54; >= 4.6.0, < 4.6.0.17
WSO2WSO2 Carbon API Gateway>= 6.7.206, < 6.7.206.594; >= 6.7.210, < 6.7.210.95; >= 9.20.74, < 9.20.74.398; >= 9.28.116, < 9.28.116.412; >= 9.29.120, < 9.29.120.228; >= 9.30.67, < 9.30.67.158; >= 9.31.86, < 9.31.86.147; >= 9.32.147, < 9.32.147.38
WSO2WSO2 Carbon API Management Implementation>= 6.7.206, < 6.7.206.594; >= 6.7.210, < 6.7.210.95; >= 9.20.74, < 9.20.74.398; >= 9.28.116, < 9.28.116.412; >= 9.29.120, < 9.29.120.228; >= 9.30.67, < 9.30.67.158; >= 9.31.86, < 9.31.86.147; >= 9.32.147, < 9.32.147.38

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-3415?
CVE-2026-3415 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.
How do I fix CVE-2026-3415?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST