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TI-2026-36534 Aliases CVE-2026-49361GHSA-4c39-fwgj-4vq7

Apache Fluss Netty Frame Decoder Memory Exhaustion Vulnerability

Priority MEDIUM 40CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00831 57th percentileScored 2026-11-07
Fix Fixed org.apache.fluss:fluss-common (Maven): 0.9.1-incubating

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Fluss (incubating)0.8.0; 0.9.0—No fix listedCNA
—org.apache.fluss:fluss-common (Maven)0.8.0-incubating-rc1 to before 0.9.1-incubating0.9.1-incubatingPatch availableGHSA-4c39-fwgj-4vq7
  • Apache Fluss (incubating) VendorApache Affected 0.8.0; 0.9.0 Fixed in — No fix listed CNA
  • org.apache.fluss:fluss-common (Maven) Vendor— Affected 0.8.0-incubating-rc1 to before 0.9.1-incubating Fixed in 0.9.1-incubating Patch available GHSA-4c39-fwgj-4vq7

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:fluss:*:*:*:*:*:*:*:*0.8.0 to before 0.9.1VulnerableApache
  • cpe:2.3:a:apache:fluss:*:*:*:*:*:*:*:* Versions 0.8.0 to before 0.9.1 Vulnerable ·Apache

Remediation

  • Fix · GHSA-4c39-fwgj-4vq7 org.apache.fluss:fluss-common (Maven) Fixed in 0.9.1-incubating Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-49361
  2. 2026-10-03 Alias added: GHSA-4c39-fwgj-4vq7

References

Advisory 3

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences