CVE-2026-49361 json
Apache Fluss Netty Frame Decoder Memory Exhaustion Vulnerability
published 2026-06-01 5 mo ago modified 2026-07-22 3 mo ago also GHSA-4c39-fwgj-4vq7 , EUVD-2026-33600
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
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.
Patch / fix
- maven org.apache.fluss:fluss-common 0.9.1-incubating
- apache fluss 0.9.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.apache.fluss:fluss-common | >=0.8.0-incubating-rc1, <0.9.1-incubating |
0.9.1-incubating |
Affected products
- Apache Software Foundation Apache Fluss (incubating)
Classification
References
-
lists.apache.org
/thread/dccw6tj0njwtmvbftq13mw7fdhsok373
vendor-advisory, web, mailing-list
-
openwall.com
/lists/oss-security/2026/05/30/5
web, mailing-list, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-49361
advisory
-
github.com
/apache/fluss
package
-
github.com
/apache/fluss/releases/tag/v0.9.1-incubating
web
Sources
- CVE List CVE-2026-49361
- GitHub Advisory GHSA-4c39-fwgj-4vq7
- NVD CVE-2026-49361
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