Vulnerability record · CVE-2026-59902 · published 17 August 2026

CVE-2026-59902: Netty uncontrolled resource consumption vulnerability

Netty · Netty

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.

7.5 CVSS 3.1 High EPSS 0.67% · top 49.8% CWE-400 · Uncontrolled resource consumption

7.5CVSS 3.1 base score

0.67%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References

23 Sep 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Netty Netty

References

Link	Tags
https://github.com/netty/netty/commit/1b5abc6443b63726c72cdd285af2feb7ddbb8ff7	Patch
https://github.com/netty/netty/pull/17213	Issue TrackingPatch
https://github.com/netty/netty/pull/17217	Issue TrackingPatch
https://github.com/netty/netty/releases/tag/netty-4.1.137.Final	Release Notes
https://github.com/netty/netty/releases/tag/netty-4.2.17.Final	Release Notes
https://github.com/netty/netty/security/advisories/GHSA-2qj4-mmr9-4v2f	Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-59902), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.