{
  "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-2026-55666",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-55666",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-24T21:06:55.637Z",
    "updatedAt": "2026-06-29T15:34:36.146Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "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": "Rocket.Chat: Email Parameter Fallback Leads To Account Takeover Within Apple OAuth",
      "summary": "Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13, in apps/meteor/app/apple/server/loginHandler.ts, handleIdentityToken parses a JWT issued by Apple during the OAuth flow. The try block checks for an email parameter. If the JWT does not contain an email address, the application falls back to accepting an arbitrary email value supplied directly in the request. Attackers are able to forge Apple JWTs that do not contain an email address and leverage this vulnerability to carry out account takeover attacks. This vulnerability is fixed in 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13.",
      "affected": [
        {
          "vendor": "RocketChat",
          "product": "Rocket.Chat",
          "versions": [
            {
              "version": ">= 8.5.0-rc.0, < 8.5.1",
              "status": "affected"
            },
            {
              "version": ">= 8.4.0-rc.0, < 8.4.4",
              "status": "affected"
            },
            {
              "version": ">= 8.3.0-rc.0, < 8.3.6",
              "status": "affected"
            },
            {
              "version": ">= 8.2.0-rc.0, < 8.2.6",
              "status": "affected"
            },
            {
              "version": ">= 8.1.0-rc.0, < 8.1.6",
              "status": "affected"
            },
            {
              "version": ">= 7.11.0-rc.0, < 8.0.7",
              "status": "affected"
            },
            {
              "version": "< 7.10.13",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}