github.com
https://github.com/netty/netty CVE-2026-73507
HIGH
Netty: Denial of Service in XmlFrameDecoder via CPU Exhaustion
Record summary
CVE-2026-73507 has a selected CVSS score of 7.5 (high).
Description
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.
Description source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
nettyBrowse netty / netty | CVE List | < 4.1.136.Final | affected |
| >= 4.2.0.Final, < 4.2.16.Final | affected | ||
io.netty:netty-codec-xmlBrowse Maven / io.netty:netty-codec-xml | GitHub Advisory | 4.2.0.Final to < 4.2.16.Final · Fixed in 4.2.16.Final | affected |
| Before 4.1.136.Final · Fixed in 4.1.136.Final | affected |
References
8github.com
https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b github.com
https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6 github.com
https://github.com/netty/netty/pull/17063 github.com
https://github.com/netty/netty/pull/17065 github.com
https://github.com/netty/netty/releases/tag/netty-4.1.136.Final github.com
https://github.com/netty/netty/releases/tag/netty-4.2.16.Final github.comConfirmation
https://github.com/netty/netty/security/advisories/GHSA-v74w-7mr3-4qg3