{
  "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-2026-54428",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-54428",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-01T17:03:53.938Z",
    "updatedAt": "2026-07-01T18:15:56.634Z",
    "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": "Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK",
      "summary": "Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.",
      "affected": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache HttpComponents Core",
          "packageName": "org.apache.httpcomponents.core5:httpcore5-h2",
          "collectionURL": "https://repo.maven.apache.org/maven2/",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5.5-alpha",
              "status": "affected",
              "versionType": "maven",
              "lessThanOrEqual": "5.5-beta1"
            },
            {
              "version": "5.0-alpha",
              "status": "affected",
              "versionType": "maven",
              "lessThanOrEqual": "5.4.2"
            }
          ]
        }
      ]
    }
  }
}