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        "providerMetadata": {
          "dateUpdated": "2026-11-09T10:13:16.862Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/11/09/2"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "packageName": "org.apache.storm:storm-client",
          "packageURL": "pkg:maven/org.apache.storm/storm-client",
          "product": "Apache Storm Nimbus",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.1.0",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "The ASF using Claude Agents"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
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              "type": "text/html",
              "value": "\u003cb\u003eDescription\u003c/b\u003e\u003cbr\u003e\u003cbr\u003eNimbus instantiates the class named by a topology\u0027s `topology.scheduler.strategy` when scheduling it. The\u003cbr\u003eallowlist intended to constrain that choice, `nimbus.scheduler.strategy.class.whitelist`, was treated as\u003cbr\u003e\"allow any class\" when unset, and it had no entry in the shipped `defaults.yaml`, so unset was the shipped\u003cbr\u003estate. An authenticated submitter could therefore cause Nimbus to instantiate any class on the Nimbus\u003cbr\u003eclasspath that has a no-argument constructor.\u003cbr\u003e\u003cbr\u003eStorm\u0027s own production artifacts contain classes with side effects suitable for this: instantiating\u003cbr\u003e`org.apache.storm.testing.InProcessZookeeper` starts a ZooKeeper server with its own threads and sockets\u003cbr\u003eand nothing closes it, and `org.apache.storm.LocalCluster` behaves similarly. Repeated submissions\u003cbr\u003etherefore consume threads, sockets and memory in the most privileged daemon in the cluster.\u003cbr\u003e\u003cbr\u003e\u003cdiv\u003e\u003cb\u003eMitigation\u003c/b\u003e\u003cbr\u003e\u003cbr\u003eUpgrade to 3.1.0, where an unset allowlist means the strategies shipped with Storm rather than any class.\u003cbr\u003e\u003cbr\u003eNote that this is a behaviour change: a cluster running an out-of-tree scheduler strategy without an\u003cbr\u003eexplicit allowlist will have those topologies refused until the class is added to\u003cbr\u003e`nimbus.scheduler.strategy.class.whitelist`. The rejection message names the refused class and the\u003cbr\u003econfiguration key.\u003cbr\u003e\u003cbr\u003eUsers who cannot upgrade immediately should set `nimbus.scheduler.strategy.class.whitelist` explicitly to\u003cbr\u003ethe strategies they intend to permit.\u003c/div\u003e"
            }
          ],
          "value": "Description\n\nNimbus instantiates the class named by a topology\u0027s `topology.scheduler.strategy` when scheduling it. The\nallowlist intended to constrain that choice, `nimbus.scheduler.strategy.class.whitelist`, was treated as\n\"allow any class\" when unset, and it had no entry in the shipped `defaults.yaml`, so unset was the shipped\nstate. An authenticated submitter could therefore cause Nimbus to instantiate any class on the Nimbus\nclasspath that has a no-argument constructor.\n\nStorm\u0027s own production artifacts contain classes with side effects suitable for this: instantiating\n`org.apache.storm.testing.InProcessZookeeper` starts a ZooKeeper server with its own threads and sockets\nand nothing closes it, and `org.apache.storm.LocalCluster` behaves similarly. Repeated submissions\ntherefore consume threads, sockets and memory in the most privileged daemon in the cluster.\n\nMitigation\n\nUpgrade to 3.1.0, where an unset allowlist means the strategies shipped with Storm rather than any class.\n\nNote that this is a behaviour change: a cluster running an out-of-tree scheduler strategy without an\nexplicit allowlist will have those topologies refused until the class is added to\n`nimbus.scheduler.strategy.class.whitelist`. The rejection message names the refused class and the\nconfiguration key.\n\nUsers who cannot upgrade immediately should set `nimbus.scheduler.strategy.class.whitelist` explicitly to\nthe strategies they intend to permit."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "moderate"
            },
            "type": "Textual description of severity"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-470",
              "description": "CWE-470 Use of Externally-Controlled input to select classes or code (\u0027unsafe reflection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-09T10:01:57.147Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread.html/hxcyk1vg9qx8bzos8g3kx91nz8d23jgt"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Apache Storm Nimbus: Submitter-Controlled Class Instantiation in Nimbus via a Fail-Open Scheduler Strategy Allowlist",
      "x_generator": {
        "engine": "Vulnogram 1.0.3"
      }
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  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-82440",
    "datePublished": "2026-11-09T10:01:57.147Z",
    "dateReserved": "2026-08-29T10:42:00.358Z",
    "dateUpdated": "2026-11-09T10:13:16.862Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}