Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll() once per response, including for 1xx. If the client pipelines GET then HEAD and the server sends 103, then 200 with GET body, then 200 for HEAD, the queue pairs HEAD with the first 200. The HEAD rule then skips reading that message’s body, so the GET entity bytes stay on the stream and the following 200 is parsed from the wrong offset. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
References (11)
Core 11
Core References
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:42644
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:23808
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:24502
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:25123
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:28010
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-42584
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2477224
X_Refsource_Confirm x_refsource_confirm
https://github.com/netty/netty/security/advisories/GHSA-57rv-r2g8-2cj3
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:36820
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:37390
Scores
CVSS v3
7.3
EPSS
0.0075
EPSS Percentile
51.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-444
Status
published
Products (7)
io.netty/netty-codec-http
0 - 4.1.133.FinalMaven
io.netty/netty-codec-http
4.2.0.Alpha1 - 4.2.13.FinalMaven
io.netty/netty-codec-http
< 4.1.133.Final
io.netty/netty-codec-http
>= 4.2.0.Alpha1, < 4.2.13.Final
netty/netty
< 4.1.133
netty/netty
< 4.1.133.Final
netty/netty
>= 4.2.0.Alpha1, < 4.2.13.Final
Published
May 13, 2026
Tracked Since
May 14, 2026