{
  "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-2023-39323",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-39323",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2023-10-05T20:36:58.756Z",
    "updatedAt": "2025-06-12T15:15:12.065Z",
    "importedAt": "2026-10-24T01:56:58.683Z",
    "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": "Arbitrary code execution during build via line directives in cmd/go",
      "summary": "Line directives (\"//line\") can be used to bypass the restrictions on \"//go:cgo_\" directives, allowing blocked linker and compiler flags to be passed during compilation. This can result in unexpected execution of arbitrary code when running \"go build\". The line directive requires the absolute path of the file in which the directive lives, which makes exploiting this issue significantly more complex.",
      "affected": [
        {
          "vendor": "Go toolchain",
          "product": "cmd/go",
          "packageName": "cmd/go",
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.20.9"
            },
            {
              "version": "1.21.0-0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.21.2"
            }
          ]
        }
      ]
    }
  }
}