CVE-2026-42582
Published: May 13, 2026
Modified: May 13, 2026
CVSS v3.1
7.5
Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final, when decoding header blocks, the non-Huffman branch of io.netty.handler.codec.http3.QpackDecoder#decodeHuffmanEncodedLiteral may execute new byte[length] for a string literal before verifying that length bytes are actually present in the compressed field section. The wire encoding allows a very large length to be expressed in few bytes. There is no check that length <= in.readableBytes() before new byte[length]. This vulnerability is fixed in 4.2.13.Final.
| Vendor | Product | Versions |
|---|---|---|
netty | netty | affected >= 4.2.0.Alpha1, < 4.2.13.Final |
io.netty | netty-codec-http3 | affected >= 4.2.0.Alpha1, < 4.2.13.Final |
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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