CVE-2026-49361
Analyzed Analyzed - Analysis Complete
Heap Exhaustion in Apache Fluss via Netty Frame Decoding

Publication date: 2026-06-01

Last updated on: 2026-06-01

Assigner: Apache Software Foundation

Description
Apache Fluss versions prior to 0.9.1 configure the Netty LengthFieldBasedFrameDecoder with Integer.MAX_VALUE as the maximum frame length, allowing unauthenticated remote attackers to exhaust JVM heap memory on TabletServer and CoordinatorServer by sending specially crafted frame headers, resulting in denial of service. This issue affects Apache Fluss (incubating): 0.8.0 and 0.9.0. Users are recommended to upgrade to version 0.9.1, which fixes the issue.
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Meta Information
Published
2026-06-01
Last Modified
2026-06-01
Generated
2026-06-21
AI Q&A
2026-06-01
EPSS Evaluated
2026-06-20
NVD
CVE-2026-49361
EUVD
EUVD-2026-33600
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
apache fluss From 0.8.0 (inc) to 0.9.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-770 The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.
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Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability exists in Apache Fluss versions prior to 0.9.1, where the Netty LengthFieldBasedFrameDecoder is configured with Integer.MAX_VALUE as the maximum frame length.

Because of this configuration, unauthenticated remote attackers can send specially crafted frame headers that cause the JVM heap memory on TabletServer and CoordinatorServer to be exhausted.

This leads to a denial of service condition, making the affected servers unavailable.

Impact Analysis

The vulnerability can be exploited by unauthenticated remote attackers to exhaust the JVM heap memory on critical components such as TabletServer and CoordinatorServer.

This results in a denial of service, potentially causing service outages and disruption of operations that rely on Apache Fluss.

Mitigation Strategies

To mitigate this vulnerability, users are recommended to upgrade Apache Fluss to version 0.9.1, which fixes the issue.

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