mmctl export download command doesn’t restrict permissions to created file to file owner

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-3113",
    "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
    "assignerShortName": "Mattermost",
    "dateUpdated": "2026-03-26T17:51:15.160Z",
    "dateReserved": "2026-02-24T10:59:55.681Z",
    "datePublished": "2026-03-26T16:18:06.693Z",
    "state": "PUBLISHED"
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        "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "shortName": "Mattermost",
        "dateUpdated": "2026-03-26T16:18:06.693Z"
      },
      "title": "mmctl export download command doesn’t restrict permissions to created file to file owner",
      "descriptions": [
        {
          "lang": "en",
          "value": "Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to set permissions on downloaded bulk export which allows other local users on the server to be able to read contents of the bulk export.. Mattermost Advisory ID: MMSA-2026-00593"
        }
      ],
      "affected": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "11.4.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "11.4.0"
            },
            {
              "version": "11.3.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "11.3.1"
            },
            {
              "version": "11.2.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "11.2.3"
            },
            {
              "version": "10.11.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "10.11.11"
            },
            {
              "version": "11.5.0",
              "status": "unaffected"
            },
            {
              "version": "11.4.1",
              "status": "unaffected"
            },
            {
              "version": "11.3.2",
              "status": "unaffected"
            },
            {
              "version": "11.2.4",
              "status": "unaffected"
            },
            {
              "version": "10.11.12",
              "status": "unaffected"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-732: Incorrect Permission Assignment for Critical Resource",
              "cweId": "CWE-732",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://mattermost.com/security-updates",
          "name": "MMSA-2026-00593",
          "tags": [
            "vendor-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
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          ],
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
            "attackVector": "LOCAL",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "REQUIRED",
            "scope": "UNCHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5,
            "baseSeverity": "MEDIUM"
          }
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Update Mattermost to versions 11.5.0, 11.4.1, 11.3.2, 11.2.4, 10.11.12 or higher."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "winfunc",
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    "adp": [
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          "shortName": "CISA-ADP",
          "dateUpdated": "2026-03-26T17:51:15.160Z"
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        "title": "CISA ADP Vulnrichment",
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