Is there a public exploit for CVE-2026-82440?

No public exploit for CVE-2026-82440 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

What does CVE-2026-82440 affect?

CVE-2026-82440 affects Apache Software Foundation Apache Storm Nimbus.

— Unscored

Description Nimbus instantiates the class named by a topology's topology.scheduler.strategy when scheduling it.

CVE-2026-82440

Description Nimbus instantiates the class named by a topology's topology.scheduler.strategy when scheduling it. The allowlist intended to constrain that choice, nimbus.scheduler.strategy.class.whitelist, was treated as "allow any class" when unset, and it had no entry in the shipped defaults.yaml, so unset was the shipped state. An authenticated submitter could therefore cause Nimbus to instantiate any class on the Nimbus classpath that has a no-argument constructor. Storm's own production artifacts contain classes with side effects suitable for this: instantiating org.apache.storm.testing.InProcessZookeeper starts a ZooKeeper server with its own threads and sockets and nothing closes it, and org.apache.storm.LocalCluster behaves similarly. Repeated submissions therefore consume threads, sockets and memory in the most privileged daemon in the cluster. Mitigation Upgrade to 3.1.0, where an unset allowlist means the strategies shipped with Storm rather than any class. Note that this is a behaviour change: a cluster running an out-of-tree scheduler strategy without an explicit allowlist will have those topologies refused until the class is added to…

Assessment

CVSS: Not yet scored
Severity: Unscored
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 9 November 2026
Last updated: 9 November 2026
Affected: Apache Software Foundation · Apache Storm Nimbus
Assigner: apache

At the source

EUVD (ENISA)

References

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