{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "6.0.0"
              },
              {
                "last_affected": "6.0.1"
              },
              {
                "introduced": "6.1.0"
              },
              {
                "fixed": "6.2.0"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "dd2c7c4b66d726250980171a113a8764ab8f8777"
            },
            {
              "last_affected": "0836d9fdbec86e1fc68b09f4274a35526c043130"
            },
            {
              "introduced": "183deb7776c34bd0db35d61071e3b1c9311eea64"
            },
            {
              "fixed": "200c274b361a2dcb7d7e8208adc44bdcd4645616"
            }
          ],
          "repo": "https://github.com/mattermost/desktop",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Mattermost",
    "cwe_ids": [
      "CWE-754"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4643.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "6.0.1"
          },
          {
            "last_affected": "5.4.13"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Mattermost Desktop App versions \u003c=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying application view in the Mattermost Desktop App which allows a malicious server or plugin to crash the desktop client via invoking {{window.close()}} in the renderer context, leading to a denial of service condition at the client level. Mattermost Advisory ID: MMSA-2026-00633",
  "id": "CVE-2026-4643",
  "modified": "2026-07-15T01:49:20.254293883Z",
  "published": "2026-05-18T08:43:34.588Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4643.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://mattermost.com/security-updates"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4643"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Calling window.close() from server-side content causes crash in the Mattermost Desktop App"
}