CVE-2026-59902NVD

Vulnerability Summary

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.

Severity Level

HIGH(7.5)

Published Date

Aug 17, 2026

Last Modified

Aug 18, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.68%Probability

Root Weakness (CWE)

CWE-400: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

ConfidentialityNone

IntegrityNone

AvailabilityHigh

External References

https://github.com/netty/netty/commit/1b5abc6443b63726c72cdd285af2feb7ddbb8ff7
https://github.com/netty/netty/pull/17213
https://github.com/netty/netty/pull/17217
https://github.com/netty/netty/releases/tag/netty-4.1.137.Final
https://github.com/netty/netty/releases/tag/netty-4.2.17.Final
https://github.com/netty/netty/security/advisories/GHSA-2qj4-mmr9-4v2f

Critical Alert 2 Active Exploits Detected Today

CVE Watchtower

CVE-2026-59902NVD

Vulnerability Summary

External References