# 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.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jul 2026
- **Updated:** 6 Jul 2026
- **Also known as:** GHSA-7469-8h9r-c5xc

## 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 (Improper Neutralization)

## Which versions are affected by CVE-2026-4249?

It affects 4 products.


Products: 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.

## 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](https://insights.sbomify.com/CVE-2026-5430/): WSO2 Multiple Products Path Traversal Vulnerability (critical 10.0, exploited in the wild)
- [CVE-2026-1728](https://insights.sbomify.com/CVE-2026-1728/): Privilege Escalation via System REST APIs in Multiple WSO2 Products Permits Admin Account Takeover (critical 9.8)
- [CVE-2025-9312](https://insights.sbomify.com/CVE-2025-9312/): Improper Certificate-Based Authentication Enforcement in Multiple WSO2 Products (critical 9.8)
- [CVE-2025-10611](https://insights.sbomify.com/CVE-2025-10611/): Potential Broken Access Control in Multiple WSO2 Products via System REST APIs (critical 9.8)
- [CVE-2025-9152](https://insights.sbomify.com/CVE-2025-9152/): Improper Privilege Management in Multiple WSO2 API Manager via keymanager-operations DCR Endpoint (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4249 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-4249 in the wild and no public exploit code.

Affected product: Wso2 Api Manager. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-4249/ (Markdown: https://insights.sbomify.com/CVE-2026-4249/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4249
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4249
- OSV: https://osv.dev/vulnerability/CVE-2026-4249

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4249/
Summaries are generated and may contain mistakes; the official description above is the record.