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CVE-2026-9602

Estado: AnalizadaMedia (6.5)—

Mattermost Desktop App versions <=6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00678

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Mattermost — Mattermost Desktop

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-9602",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2026-9602",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-17T12:54:18.132613Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
          "scope": "UNCHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
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      "source": "responsibledisclosure@mattermost.com",
      "affectedData": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "semver",
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            },
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              "version": "0",
              "versionType": "semver",
              "lessThanOrEqual": "5.6.13"
            },
            {
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              "version": "6.3.0"
            },
            {
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              "version": "6.2.1.0"
            },
            {
              "status": "unaffected",
              "version": "5.13.7.0"
            }
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  "published": "2026-07-17T11:17:15.297",
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      "tags": [
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "responsibledisclosure@mattermost.com",
      "description": [
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          "value": "CWE-400"
        }
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mattermost Desktop App versions <=6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00678"
    }
  ],
  "lastModified": "2026-07-30T14:38:53.980",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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  "sourceIdentifier": "responsibledisclosure@mattermost.com"
}