CVE-2026-42584
Published: May 13, 2026
Modified: May 13, 2026
CVSS v3.1
7.3
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.
| Vendor | Product | Versions |
|---|---|---|
netty | netty | affected >= 4.2.0.Alpha1, < 4.2.13.Finalaffected < 4.1.133.Final |
io.netty | netty-codec-http | affected >= 4.2.0.Alpha1, < 4.2.13.Finalaffected < 4.1.133.Final |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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