CVE-2026-42582

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.

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Produits concernés

• netty
• io.netty netty-codec-http3
• Netty netty

Scores CVSS

Faiblesses (CWE)

• CWE-770
• CWE-789

Références

• https://github.com/netty/netty/security/advisories/GHSA-2c5c-chwr-9hqw ExploitVendor Advisory
• https://github.com/netty/netty/security/advisories/GHSA-2c5c-chwr-9hqw ExploitVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories