{
  "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-2026-66749",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-66749",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-28T15:30:46.773Z",
    "updatedAt": "2026-07-28T16:43:43.566Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "Let's Chat 0.4.0 - 0.4.8 Denial of Service via Null Dereference in Room Lookup",
      "summary": "Let's Chat 0.4.0 through 0.4.8 contains a null dereference vulnerability that allows authenticated attackers to crash the server by supplying a valid 24-character hex string room parameter that matches no document in the database. Attackers can send a crafted GET /messages request causing an uncaught TypeError in an asynchronous Mongoose callback that terminates the Node.js server process, with the same defect reachable through multiple code paths including the socket.io interface.",
      "affected": [
        {
          "vendor": "sdelements",
          "product": "lets-chat",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "0.4.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "0.4.8"
            },
            {
              "version": "84981a6d2534445c00ea4e095c934e46943c0b1d",
              "status": "affected",
              "versionType": "git",
              "lessThanOrEqual": "617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c"
            }
          ]
        }
      ]
    }
  }
}