{
  "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-2026-56813",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-56813",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-10T12:51:08.758Z",
    "updatedAt": "2026-09-24T21:30:13.749Z",
    "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": "Cookie attribute injection in Plug.Conn.Cookies.encode/2",
      "summary": "Improper Neutralization of Parameter/Argument Delimiters vulnerability in elixir-plug plug allows an attacker to inject or override HTTP cookie attributes.\n\nThe Plug.Conn.Cookies.encode/2 function in lib/plug/conn/cookies.ex builds the Set-Cookie response header by interpolating the cookie value and its path, domain, same_site, and extra attributes directly into the header without neutralizing the ; delimiter that separates cookie attributes.\n\nAn application that places attacker-controlled data into a cookie value or attribute (for example via Plug.Conn.put_resp_cookie/4 when reflecting a username or preference) lets an attacker inject a ; to append or override cookie attributes (such as Domain and Path scope, or dropping the Secure and HttpOnly flags), enabling cookie tossing and session fixation. Carriage return, line feed, and null bytes are rejected by Plug.Conn header validation, so HTTP response splitting is not possible, but attribute injection through ; is not prevented.\n\nThis issue affects plug: from 0.1.0 before 1.16.6, from 1.17.0 before 1.17.4, from 1.18.0 before 1.18.5, from 1.19.1 before 1.19.5, and from 1.20.0 before 1.20.3.",
      "affected": [
        {
          "vendor": "elixir-plug",
          "product": "plug",
          "packageName": "plug",
          "collectionURL": "https://repo.hex.pm",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0.1.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.16.6"
            },
            {
              "version": "1.17.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.17.4"
            },
            {
              "version": "1.18.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.18.5"
            },
            {
              "version": "1.19.1",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.19.5"
            },
            {
              "version": "1.20.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.20.3"
            }
          ]
        },
        {
          "vendor": "elixir-plug",
          "product": "plug",
          "packageName": "elixir-plug/plug",
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "f26876aa67aaeb38e616638aa3efbcc2fe2906a5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "*",
              "changes": [
                {
                  "at": "3f00dfad4e20ba88472e315c90a25742bf178f8e",
                  "status": "unaffected"
                },
                {
                  "at": "a6d1248659022749869963fd302687165ecf8c8b",
                  "status": "unaffected"
                },
                {
                  "at": "4167981747fe9ce75f374b94a28861ae950ea992",
                  "status": "unaffected"
                },
                {
                  "at": "149d9ed68fee0b4f77efd1e835ce5d785856697b",
                  "status": "unaffected"
                },
                {
                  "at": "eceb8315ce9a31ef784943a95a8624ebd1bc7e06",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}