{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "5.6.13"
              },
              {
                "fixed": "5.13.7"
              },
              {
                "introduced": "0"
              },
              {
                "fixed": "6.3"
              },
              {
                "introduced": "6.0.2"
              },
              {
                "fixed": "6.2.1"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6c31af67e4228f2d4c31aaa2242a7a59c46fa6de"
            },
            {
              "fixed": "274602892a4391ac8c455cc09bdb52632ab282a9"
            },
            {
              "introduced": "30a408117be7b1f7adb21f0a70dd1610c2e6eaaa"
            },
            {
              "fixed": "9569d76bd8de2f8255fe80f0b9379dc429198c82"
            }
          ],
          "repo": "https://github.com/mattermost/desktop",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Mattermost",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9602.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "6.0.2"
          },
          {
            "last_affected": "5.6.13"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Mattermost Desktop App versions \u003c=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",
  "id": "CVE-2026-9602",
  "modified": "2026-08-16T03:30:59.954594605Z",
  "published": "2026-07-17T10:03:26.292Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9602.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://mattermost.com/security-updates"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9602"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Mattermost Desktop App crashes when malformed arguments are provided to some exposed IPC methods"
}