{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "5.13.2"
              },
              {
                "fixed": "5.13.3"
              },
              {
                "introduced": "6.0.0"
              },
              {
                "fixed": "6.0.3"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "b80c7835cd84620601cfe1de7dc50450d12e2ab2"
            },
            {
              "fixed": "c6cb9ed5ca9cab2c181652d27c673b8433a5bb2c"
            },
            {
              "introduced": "dd2c7c4b66d726250980171a113a8764ab8f8777"
            },
            {
              "fixed": "54fe4b55ba0f039d62477616025193b353a9f134"
            }
          ],
          "repo": "https://github.com/mattermost/desktop",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Mattermost",
    "cwe_ids": [
      "CWE-939"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1046.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "6.2.0"
          },
          {
            "last_affected": "5.2.13"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Mattermost Desktop App versions \u003c=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577",
  "id": "CVE-2026-1046",
  "modified": "2026-07-15T01:49:03.821200145Z",
  "published": "2026-02-16T12:10:38.668Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1046.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://mattermost.com/security-updates"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1046"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Arbitrary application execution via unvalidated server-controlled URLs in Help menu"
}