CVE-2026-59902
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductNetty
PublishedAug 17, 2026
First seenAug 17, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- netty netty4.1.137, 4.2.17 or later
- io.netty:netty-transport-sctp4.2.17.Final, 4.1.137.Final or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| netty netty | v < 4.1.137, 4.2.0 ≤ v < 4.2.17 | 4.1.137, 4.2.17 |
| io.netty:netty-transport-sctpMaven | 4.2.0.Final ≤ v < 4.2.17.Final, v < 4.1.137.Final | 4.2.17.Final, 4.1.137.Final |
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