CVE-2026-4249: Denial of Service via Malicious JSON Payloads in Throttling Events in Multiple WSO2 Products Causing Persistent Service Disruption
WSO2 · WSO2 Universal Gateway
Vendor fix available · Affected: WSO2 Universal Gateway · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 46% of scored CVEs
DescriptionCVE.org
The throttling event handling mechanism in multiple WSO2 products accepts user-supplied JSON payloads without sufficient validation of their structure and content. This allows an unauthenticated remote attacker to inject malicious JSON data that can lead to a persistent denial of service condition. Successful exploitation of this vulnerability can disrupt the API Gateway, preventing legitimate API traffic from being processed and impacting complete service availability. The denial of service is persistent, requiring manual intervention to restore normal operations.
Affected products4
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- WSO2 · WSO2 Universal Gatewayfrom 4.5.0 before 4.5.0.54; from 4.6.0 before 4.6.0.18; from 4.7.0 before 4.7.0.2
- WSO2 · WSO2 Traffic Managerfrom 4.5.0 before 4.5.0.53; from 4.6.0 before 4.6.0.18; from 4.7.0 before 4.7.0.2
- WSO2 · WSO2 API Control Planefrom 4.5.0 before 4.5.0.55; from 4.6.0 before 4.6.0.19; from 4.7.0 before 4.7.0.2
- WSO2 · WSO2 API Managerfrom 3.2.0 before 3.2.0.470; from 3.2.1 before 3.2.1.89; from 4.0.0 before 4.0.0.390; from 4.1.0 before 4.1.0.254; from 4.2.0 before 4.2.0.194; from 4.3.0 before 4.3.0.105 and 4 more
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-4249 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.