Apache Storm DRPC: Unauthenticated Unbounded Memory Growth in DRPC

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-82439
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-14 14:17:12 UTC
Updated2026-09-14 14:17:12 UTC
DescriptionDescription The DRPC server kept a map from function name to request queue and created an entry the first time a function name was seen. No code path ever removed an entry: request cleanup removed the request from its queue, and the shutdown path drained queues, but the queue object and its map entry remained for the life of the process. Function names come from the client and are not constrained to functions any topology has registered, so the number of retained entries is bounded only by the number of distinct names an attacker chooses to send, and each retained entry holds the name itself. `drpc.authorizer` is unset by default, so no credentials are required to reach the endpoint. The retained state is permanent rather than a transient load spike, so the effect accumulates until the DRPC server exhausts its heap. Mitigation Upgrade to 3.1.0, where a function's queue is removed once nothing is waiting in it. Users who cannot upgrade immediately should configure `drpc.authorizer` so that only trusted principals can reach the DRPC endpoints, and should ensure the DRPC ports are not reachable from untrusted networks. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.

Risk And Classification

Problem Types: CWE-770 | CWE-770 CWE-770 Allocation of resources without limits or throttling

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Storm DRPC affected 3.0.0 3.1.0 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/7sgzvv5lzz93jn6vy74qfk105bhmkrzs [email protected] lists.apache.org
www.openwall.com/lists/oss-security/2026/09/13/18 ADP www.openwall.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: The ASF using Claude Agents (en)

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