{
  "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-2026-18691",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-18691",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-11T18:46:02.766Z",
    "updatedAt": "2026-08-11T20:22:00.933Z",
    "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": "Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure",
      "summary": "An issue in MongoDB Server's intra-cluster connection setup could allow a party with suitable network access to influence which authentication mechanism is used when one replica set member connects to another. Under certain conditions, this could cause the cluster's shared internal credential to be transmitted in a less-protected form, potentially allowing that credential to be recovered. If recovered, the credential could be used to authenticate as the internal superuser to nodes in the deployment.",
      "affected": [
        {
          "vendor": "MongoDB",
          "product": "MongoDB Server",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8.3.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "8.3.8"
            },
            {
              "version": "8.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "8.0.29"
            },
            {
              "version": "7.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "7.0.40"
            }
          ]
        }
      ]
    }
  }
}