CVE-2026-82435 Apache Storm - Denial of Service

Apache Storm contains a denial of service vulnerability caused by the Netty message decoder allocating large buffers before SASL authentication, letting unauthenticated attackers with TCP access to worker ports cause resource exhaustion, exploit requires TCP reachability to worker port.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.65% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-789

Vendor fix

Upgrade to version 3.1.0 or later; alternatively, restrict worker port access within the cluster and enable storm.messaging.netty.authentication.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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