{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-18256",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-18256",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-16T07:13:43.684Z",
    "updatedAt": "2026-10-16T11:58:08.912Z",
    "importedAt": "2026-10-24T01:57:55.771Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Private team metadata disclosure via the team search API",
      "summary": "Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to properly restrict private teams from public team search results, which allows an authenticated user without permission to list private teams to disclose the ID, name, and display name of private teams via a modified team search request. Mattermost Advisory ID: MMSA-2026-00748",
      "affected": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "11.10.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "11.10.0"
            },
            {
              "version": "11.7.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "11.7.9"
            },
            {
              "version": "11.9.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "11.9.1"
            },
            {
              "version": "11.8.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "11.8.5"
            },
            {
              "version": "11.11.0",
              "status": "unaffected"
            },
            {
              "version": "11.10.1",
              "status": "unaffected"
            },
            {
              "version": "11.7.10",
              "status": "unaffected"
            },
            {
              "version": "11.9.2",
              "status": "unaffected"
            },
            {
              "version": "11.8.6",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  }
}