CVE-2026-49361

Apache Fluss Netty Frame Decoder Memory Exhaustion Vulnerability

Published Jun 1, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-4c39-fwgj-4vq7 Apache Fluss: Unauthenticated remote attackers can exhaust JVM heap memory using crafted frame headers via TabletServer/CoordinatorServer
History
Type Values Removed Values Added
First Time appeared Apache fluss (incubating)
Vendors & Products Apache fluss (incubating)
Type Values Removed Values Added
First Time appeared Apache
Apache fluss
CPEs cpe:2.3:a:apache:fluss:*:*:*:*:*:*:*:*
Vendors & Products Apache
Apache fluss
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Apache Fluss Netty Frame Decoder Memory Exhaustion Vulnerability
Weaknesses CWE-400
CWE-770
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Jun 1, 2026, 4:48 PM
Reserved
May 29, 2026, 3:44 PM
Status
Analyzed
Published
Jun 1, 2026, 9:16 AM
Modified
Jul 22, 2026, 7:10 AM