{
  "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-2026-82432",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-82432",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-14T14:11:27.374Z",
    "updatedAt": "2026-09-14T20:03:24.941Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "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 Storm Nimbus: Blobstore Authorization Bypass via Rebalance Configuration Overrides",
      "summary": "Description\n\nNimbus validated `topology.blobstore.map` against the calling subject at submission time only. The rebalance\noperation accepts configuration overrides and stripped a small set of keys from them, but never re-ran that\nvalidation, so a caller authorised to rebalance a topology could introduce a blobstore map entry naming a\nblob whose ACL does not grant them access. Supervisors localise whatever key the map names, placing the\nblob's contents into the topology's working directory.\n\nThe same advisory covers `listBlobs`, which performed no authorization check and passed no subject, unlike\nthe neighbouring `getBlobMeta` and `beginBlobDownload` operations. It therefore returned every key in the\nblobstore to any caller able to reach the Nimbus Thrift port, which provides the key names that make the\nabove practical. On its own the disclosure is metadata only.\n\nMitigation\n\nUpgrade to 3.1.0, where rebalance configuration overrides are validated exactly as submission-time\nconfiguration is, against the rebalancing caller, and where `listBlobs` applies the configured\nauthorization.\n\nUsers who cannot upgrade immediately should restrict rebalance rights to trusted principals, keeping in mind\nthat membership of a topology's `topology.users` or `topology.groups` confers them.\n\nCredit\n\nThe ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.",
      "affected": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Storm Nimbus",
          "packageName": "org.apache.storm:storm-server",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "3.0.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.1.0"
            }
          ]
        }
      ]
    }
  }
}