CVE-2026-4249
Denial of Service via Malicious JSON Payloads in Throttling Events in Multiple WSO2 Products Causing Persistent Service Disruption
HIGH 8.6
At a glance
- Source
- NVD
- EPSS
- EPSS 0.56 % · percentile 46 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- WSO2
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-707 — Improper Neutralization
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | WSO2 |
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD · ed10eef1-636d-4fbe-9993-6890dfa878f8 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-41871
- GCVE · GCVE-0-2026-4249
Affected configurations (NVD CPE)
cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.55cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.19cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.0.0 < 4.0.0.390cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.1.0 < 4.1.0.254cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.2.0 < 4.2.0.194cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.3.0 < 4.3.0.105cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.4.0 < 4.4.0.69cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.54cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.18cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.53cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.18cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.54cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.18
Affected products
| Product | Versions |
|---|---|
| WSO2 · WSO2 Universal Gateway | affected 4.5.0 < 4.5.0.54 ; affected 4.6.0 < 4.6.0.18 ; affected 4.7.0 < 4.7.0.2 |
| WSO2 · WSO2 Traffic Manager | affected 4.5.0 < 4.5.0.53 ; affected 4.6.0 < 4.6.0.18 ; affected 4.7.0 < 4.7.0.2 |
| WSO2 · WSO2 API Control Plane | affected 4.5.0 < 4.5.0.55 ; affected 4.6.0 < 4.6.0.19 ; affected 4.7.0 < 4.7.0.2 |
| WSO2 · WSO2 API Manager | unknown 0 < 3.2.0 ; affected 3.2.0 < 3.2.0.470 ; affected 3.2.1 < 3.2.1.89 ; affected 4.0.0 < 4.0.0.390 ; affected 4.1.0 < 4.1.0.254 ; affected 4.2.0 < 4.2.0.194 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |