{
  "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-2026-1299",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-1299",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-01-23T16:27:13.346Z",
    "updatedAt": "2026-03-03T14:43:35.655Z",
    "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": "email BytesGenerator header injection due to unquoted newlines",
      "summary": "The \nemail module, specifically the \"BytesGenerator\" class, didn’t properly quote newlines for email headers when \nserializing an email message allowing for header injection when an email\n is serialized. This is only applicable if using \"LiteralHeader\" writing headers that don't respect email folding rules, the new behavior will reject the incorrectly folded headers in \"BytesGenerator\".",
      "affected": [
        {
          "vendor": "Python Software Foundation",
          "product": "CPython",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "python",
              "lessThan": "3.10.20"
            },
            {
              "version": "3.11.0",
              "status": "affected",
              "versionType": "python",
              "lessThan": "3.11.15"
            },
            {
              "version": "3.12.0",
              "status": "affected",
              "versionType": "python",
              "lessThan": "3.12.13"
            },
            {
              "version": "3.13.0",
              "status": "affected",
              "versionType": "python",
              "lessThan": "3.13.12"
            },
            {
              "version": "3.14.0",
              "status": "affected",
              "versionType": "python",
              "lessThan": "3.14.3"
            },
            {
              "version": "3.15.0a1",
              "status": "affected",
              "versionType": "python",
              "lessThan": "3.15.0a6"
            }
          ]
        }
      ]
    }
  }
}