{
  "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-2026-50131",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-50131",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-10T20:27:43.370Z",
    "updatedAt": "2026-06-11T14:16:17.350Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "Fedify has an incomplete SSRF mitigation after GHSA-p9cg-vqcc-grcx: validatePublicUrl allows special-use IPv4 ranges",
      "summary": "Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Fedify previously addressed SSRF/internal network access in GHSA-p9cg-vqcc-grcx by adding public URL validation before runtime document and media fetching. However, the IPv4 validation logic present starting in version 0.11.2 and prior to versions 1.9.12, 1.10.11, 2.0.19, 2.1.15, and 2.2.4 appears incomplete. The `validatePublicUrl()` protection relies on `isValidPublicIPv4Address()` to reject non-public IPv4 destinations. The function blocks common private and local ranges such as `10.0.0.0/8`, `127.0.0.0/8`, `169.254.0.0/16`, `172.16.0.0/12`, and `192.168.0.0/16`, but it still treats several special-use, reserved, multicast, benchmarking, and carrier-grade NAT IPv4 ranges as valid public destinations. Because this validation is used as an SSRF defense before outbound fetches, this appears to be an incomplete mitigation or bypass class for the previous SSRF issue. Versions 1.9.12, 1.10.11, 2.0.19, 2.1.15, and 2.2.4 contain an updated patch.",
      "affected": [
        {
          "vendor": "fedify-dev",
          "product": "fedify",
          "versions": [
            {
              "version": ">= 0.11.2, < 1.9.12",
              "status": "affected"
            },
            {
              "version": ">= 1.10.0, < 1.10.11",
              "status": "affected"
            },
            {
              "version": ">= 2.0.0, < 2.0.19",
              "status": "affected"
            },
            {
              "version": ">= 2.1.0, < 2.1.15",
              "status": "affected"
            },
            {
              "version": ">= 2.2.0, < 2.2.4",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "fedify-dev",
          "product": "vocab-runtime",
          "versions": [
            {
              "version": "< 2.0.19",
              "status": "affected"
            },
            {
              "version": ">= 2.1.0, < 2.1.15",
              "status": "affected"
            },
            {
              "version": ">= 2.2.0, < 2.2.4",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}