CVE-2026-73507

HIGH

CVE: CVE-2026-73507 - Netty is an asynchronous, event-driven network application frameworkSign in to save

CVSS

7.5

CVSS v3.1

EPSS

N/A

Exploit Prediction Score

Published

August 13, 2026

Exploitability

No EPSS data available

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.

Weaknesses

CWE-400

Affected Packages

No package data available.

Aliases

CVE-2026-73507

Related references

Publisher and database URLs for this record (shown for attribution; reading stays in Bugflare).

https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b
https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6
https://github.com/netty/netty/releases/tag/netty-4.1.136.Final
https://github.com/netty/netty/releases/tag/netty-4.2.16.Final
https://github.com/netty/netty/security/advisories/GHSA-v74w-7mr3-4qg3