CVE-2026-3116

{"id": "CVE-2026-3116", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "responsibledisclosure@mattermost.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.2}]}, "published": "2026-03-26T17:16:42.823", "references": [{"url": "https://mattermost.com/security-updates", "source": "responsibledisclosure@mattermost.com"}], "vulnStatus": "Undergoing Analysis", "weaknesses": [{"type": "Secondary", "source": "responsibledisclosure@mattermost.com", "description": [{"lang": "en", "value": "CWE-400"}]}], "descriptions": [{"lang": "en", "value": "Mattermost Plugins versions <=11.4 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to validate incoming request size which allows an authenticated attacker to cause service disruption via the webhook endpoint. Mattermost Advisory ID: MMSA-2026-00589"}, {"lang": "es", "value": "Las versiones de los plugins de Mattermost &lt;=11.4 11.0.4 11.1.3 11.3.2 10.11.11.0 no validan el tama\u00f1o de las solicitudes entrantes, lo que permite a un atacante autenticado causar interrupci\u00f3n del servicio a trav\u00e9s del endpoint de webhook. ID de aviso de Mattermost: MMSA-2026-00589"}], "lastModified": "2026-03-30T13:26:50.827", "sourceIdentifier": "responsibledisclosure@mattermost.com"}