Description
Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.124.Final and 4.2.4.Final, Netty is vulnerable to MadeYouReset DDoS. This is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. This issue has been patched in versions 4.1.124.Final and 4.2.4.Final.
References (3)
Core 3
Core References
Exploit, Vendor Advisory x_refsource_confirm
https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4
Third Party Advisory, US Government Resource
https://www.kb.cert.org/vuls/id/767506
Scores
CVSS v3
7.5
EPSS
0.0095
EPSS Percentile
56.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (3)
io.grpc/grpc-netty-shaded
0 - 1.75.0Maven
io.netty/netty-codec-http2
4.2.0.Alpha1 - 4.2.4.FinalMaven
netty/netty
< 4.1.124
Published
Aug 13, 2025
Tracked Since
Feb 18, 2026