{
  "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-2026-54892",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-54892",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-23T12:31:12.629Z",
    "updatedAt": "2026-06-23T18:21:14.232Z",
    "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": "Plug: quadratic-time decoding of nested query/body parameters enables denial of service",
      "summary": "Inefficient algorithmic complexity in Plug's nested-parameter decoder allows an unauthenticated remote attacker to cause denial of service. Plug.Conn.Query.decode/4 (and Plug.Conn.Query.decode_each/2) parse query strings and application/x-www-form-urlencoded request bodies. When a key contains many bracketed segments such as a[a][a][a]=1, the decoder walks the brackets and, for each of the N levels, performs a map operation keyed on an ever-growing binary prefix of the key, hashing the full byte range at each step. The total decode cost is therefore quadratic in the number of nesting levels.\n\nWith the default Plug.Parsers.URLENCODED body limit of 1,000,000 bytes, a single request can carry roughly 333,000 nesting levels and saturate a BEAM scheduler for minutes. A small number of concurrent requests can saturate all schedulers and render a Plug-based server unresponsive. No authentication or knowledge of application routes is required.\n\nThis vulnerability is associated with program files lib/plug/conn/query.ex and program routines Plug.Conn.Query.decode/4, Plug.Conn.Query.decode_each/2, Plug.Conn.Query.split_keys/6, Plug.Conn.Query.insert_keys/3, and Plug.Conn.Query.finalize_pointer/2.\n\nThis issue affects plug from 1.15.0 before 1.15.5, 1.16.4, 1.17.2, 1.18.3, and 1.19.3.",
      "affected": [
        {
          "vendor": "elixir-plug",
          "product": "plug",
          "packageName": "plug",
          "collectionURL": "https://repo.hex.pm",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1.15.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.15.5"
            },
            {
              "version": "1.16.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.16.4"
            },
            {
              "version": "1.17.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.17.2"
            },
            {
              "version": "1.18.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.18.3"
            },
            {
              "version": "1.19.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.19.3"
            }
          ]
        },
        {
          "vendor": "elixir-plug",
          "product": "plug",
          "packageName": "elixir-plug/plug",
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "712b875d3442c765d8d37e546ffd5ad9f8afcc55",
              "status": "affected",
              "versionType": "git",
              "lessThan": "*",
              "changes": [
                {
                  "at": "c317d08fdcf96e17931f7419275b2b8c4bf3e951",
                  "status": "unaffected"
                },
                {
                  "at": "9c5d37c440eaae92869eed7c014c47266744fadb",
                  "status": "unaffected"
                },
                {
                  "at": "d737eb236f17e31a36290e39f9ef3cd86a1343bd",
                  "status": "unaffected"
                },
                {
                  "at": "d4e5568392a4b29e545b91e12e87d6098f976145",
                  "status": "unaffected"
                },
                {
                  "at": "a61124aa625d819a218fb07f90afbac8aa85eb0e",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}