CVE-2026-49361

Apache Fluss Netty Frame Decoder Memory Exhaustion Vulnerability

State: Published
Severity: 7.5 High
Published: Jun 1, 2026
Updated: Jun 1, 2026
Reserved: May 29, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling
CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
Apache Fluss (incubating)Apache Software Foundation	0.8.0Affected 0.9.0Affected

References

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