CVE-2026-73507

Published: Aug 13, 2026Modified: Sep 23, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Affected (2)

Products: Netty: Netty

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Netty Netty	version < 4.1.136
Netty Netty	4.2.0 ≤ version < 4.2.16

Related CWEs

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (5)

https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b

Source: security-advisories@github.com

Patch

https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6

Source: security-advisories@github.com

Patch

https://github.com/netty/netty/releases/tag/netty-4.1.136.Final

Source: security-advisories@github.com

Release Notes

https://github.com/netty/netty/releases/tag/netty-4.2.16.Final

Source: security-advisories@github.com

Release Notes

https://github.com/netty/netty/security/advisories/GHSA-v74w-7mr3-4qg3

Source: security-advisories@github.com

Vendor Advisory

Timeline

No history available yet.