CVE-2026-3415Network attack vector

File disclosure and resource exhaustion via XXE

Published Aug 6, 2026 · Updated Aug 6, 2026

XXE in WSO2 SchemaValidator Mediator products allows remote authenticated users to read server files via crafted XML validation requests. The mediator's XML parser resolves external entities from user-supplied validation content instead of disabling external entity resolution. Access to a configured mediator flow with high privileges is required; exploitation also permits outbound requests and parser resource exhaustion.

CVSS severity8.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

XXE in WSO2 SchemaValidator Mediator products allows remote authenticated users to read server files via crafted XML validation requests. The mediator's XML parser resolves external entities from user-supplied validation content instead of disabling external entity resolution. Access to a configured mediator flow with high privileges is required; exploitation also permits outbound requests and parser resource exhaustion.

The record

CVE
CVE-2026-3415
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
WSO2
Product
WSO2 Traffic Manager
Classifications
CWE-776, CAPEC-106, T1499.004, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.5.0 <4.5.0.52
  2. Affected versionversion=4.6.0 <4.6.0.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WSO2 · WSO2 Traffic Managerversion=4.5.0 <4.5.0.52; version=4.6.0 <4.6.0.16
WSO2 · WSO2 API Control Planeversion=4.5.0 <4.5.0.54; version=4.6.0 <4.6.0.17
WSO2 · WSO2 API Managerversion=3.2.0 <3.2.0.472; version=3.2.1 <3.2.1.91; version=4.1.0 <4.1.0.254; version=4.2.0 <4.2.0.194; version=4.3.0 <4.3.0.105; version=4.4.0 <4.4.0.68; version=4.5.0 <4.5.0.53; version=4.6.0 <4.6.0.16
WSO2 · WSO2 Universal Gatewayversion=4.5.0 <4.5.0.53; version=4.6.0 <4.6.0.16
WSO2 · WSO2 Carbon API Management Implementationversion=6.7.206 <6.7.206.594; version=6.7.210 <6.7.210.95; version=9.20.74 <9.20.74.398; version=9.28.116 <9.28.116.412; version=9.29.120 <9.29.120.228; version=9.30.67 <9.30.67.158; version=9.31.86 <9.31.86.147; version=9.32.147 <9.32.147.38
WSO2 · WSO2 Carbon - API Gatewayversion=6.7.206 <6.7.206.594; version=6.7.210 <6.7.210.95; version=9.20.74 <9.20.74.398; version=9.28.116 <9.28.116.412; version=9.29.120 <9.29.120.228; version=9.30.67 <9.30.67.158; version=9.31.86 <9.31.86.147; version=9.32.147 <9.32.147.38

Published CVSS scores

8.7WSO2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-776Improper Handling of Special Elements in XML Document Type Declaration (DTD)
CAPEC-106XML External Entity Injection
T1499.004Application or System Exploitation
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo