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CVE-2026-73507

Netty: Denial of Service in XmlFrameDecoder via CPU Exhaustion PUBLISHED

Description (CNA)

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.xml.XmlFrameDecoder.decode() failed to preserve closing-tag parser state across invocations, so an unauthenticated remote attacker could trickle-feed repeated </ sequences that repeatedly rescanned the accumulated buffer and exhausted an EventLoop thread's CPU, causing denial of service with a maxFrameLength of 1 MB. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.

Affected (CNA)

Vendor / productVersions
netty / nettyaffected < 4.1.136.Final; affected >= 4.2.0.Final, < 4.2.16.Final

CWE

CWE-400

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.