CVE-2026-4249 Denial of service in WSO2 API Control Plane
Unauthenticated attackers can cause persistent denial of service in WSO2 API Gateway products by sending malicious JSON payloads to throttling events.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4249?
CVE-2026-4249 is a high-severity denial of service vulnerability in Wso2 Api Manager, published on 6 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-707
Which versions are affected by CVE-2026-4249?
It affects 4 products.
Products include Wso2 Api Control Plane, Wso2 Api Manager, Wso2 Traffic Manager, Wso2 Universal Gateway.
How do I fix CVE-2026-4249?
No fix has been published for CVE-2026-4249 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-4249 being exploited?
There is no known exploitation of CVE-2026-4249 in the wild and no public exploit code.
Other vulnerabilities in Wso2 Api Manager
- CVE-2026-5430 WSO2 Multiple Products Path Traversal Vulnerability
- CVE-2026-1728 Privilege Escalation via System REST APIs in Multiple WSO2 Products Permits Admin Account Takeover
- CVE-2025-9312 Improper Certificate-Based Authentication Enforcement in Multiple WSO2 Products
- CVE-2025-10611 Potential Broken Access Control in Multiple WSO2 Products via System REST APIs
- CVE-2025-9152 Improper Privilege Management in Multiple WSO2 API Manager via keymanager-operations DCR Endpoint
Sources
Also known as GHSA-7469-8h9r-c5xc.