FKIE_CVE-2026-4249

Vulnerability from fkie_nvd - Published: 2026-07-06 11:16 - Updated: 2026-07-06 18:37
Severity
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Summary
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.
References
ed10eef1-636d-4fbe-9993-6890dfa878f8https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5236/
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "WSO2 Universal Gateway",
          "vendor": "WSO2",
          "versions": [
            {
              "lessThan": "4.5.0.54",
              "status": "affected",
              "version": "4.5.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.6.0.18",
              "status": "affected",
              "version": "4.6.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.7.0.2",
              "status": "affected",
              "version": "4.7.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "WSO2 Traffic Manager",
          "vendor": "WSO2",
          "versions": [
            {
              "lessThan": "4.5.0.53",
              "status": "affected",
              "version": "4.5.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.6.0.18",
              "status": "affected",
              "version": "4.6.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.7.0.2",
              "status": "affected",
              "version": "4.7.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "WSO2 API Control Plane",
          "vendor": "WSO2",
          "versions": [
            {
              "lessThan": "4.5.0.55",
              "status": "affected",
              "version": "4.5.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.6.0.19",
              "status": "affected",
              "version": "4.6.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.7.0.2",
              "status": "affected",
              "version": "4.7.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "WSO2 API Manager",
          "vendor": "WSO2",
          "versions": [
            {
              "lessThan": "3.2.0",
              "status": "unknown",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThan": "3.2.0.470",
              "status": "affected",
              "version": "3.2.0",
              "versionType": "custom"
            },
            {
              "lessThan": "3.2.1.89",
              "status": "affected",
              "version": "3.2.1",
              "versionType": "custom"
            },
            {
              "lessThan": "4.0.0.390",
              "status": "affected",
              "version": "4.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.1.0.254",
              "status": "affected",
              "version": "4.1.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.2.0.194",
              "status": "affected",
              "version": "4.2.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.3.0.105",
              "status": "affected",
              "version": "4.3.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.4.0.69",
              "status": "affected",
              "version": "4.4.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.5.0.54",
              "status": "affected",
              "version": "4.5.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.6.0.18",
              "status": "affected",
              "version": "4.6.0",
              "versionType": "custom"
            },
            {
              "lessThan": "4.7.0.2",
              "status": "affected",
              "version": "4.7.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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.\n\nSuccessful 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."
    }
  ],
  "id": "CVE-2026-4249",
  "lastModified": "2026-07-06T18:37:30.263",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.0,
        "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-4249",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-06T11:03:16.637529Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-06T11:16:30.433",
  "references": [
    {
      "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
      "url": "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5236/"
    }
  ],
  "sourceIdentifier": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-707"
        }
      ],
      "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
      "type": "Secondary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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