High 7.5Published Aug 17, 2026

CVE-2026-59902Netty: Memory Exhaustion in SctpMessageCompletionHandler

Updated under an hour ago (2026-10-19 05:50 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.sctp.SctpMessageCompletionHandler limits incomplete messages and fragment counts but not maxBufferedBytes, allowing unauthenticated peers to exhaust memory with large SCTP fragments. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Aug 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

netty netty netty:netty (from the name)	before 4.1.137.Final; from 4.2.0.Final, < 4.2.17.Final	CNA record
netty netty netty:netty	before 4.1.137; from 4.2.0 before 4.2.17	NVD

References

https://github.com/netty/netty/security/advisories/GHSA-2qj4-mmr9-4v2fx-refsource-confirm, vendor-advisory
https://github.com/netty/netty/pull/17213x-refsource-misc, issue-tracking, patch
https://github.com/netty/netty/pull/17217x-refsource-misc, issue-tracking, patch
https://github.com/netty/netty/commit/1b5abc6443b63726c72cdd285af2feb7ddbb8ff7x-refsource-misc, patch
https://github.com/netty/netty/releases/tag/netty-4.1.137.Finalx-refsource-misc, release-notes
https://github.com/netty/netty/releases/tag/netty-4.2.17.Finalx-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.