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2 vulnerabilities found for netty-codec-http3 by io.netty
CVE-2026-42582 (GCVE-0-2026-42582)
Vulnerability from nvd – Published: 2026-05-13 18:06 – Updated: 2026-05-13 19:35
VLAI
Title
Netty: HTTP/3 QPACK literal unbounded allocation
Summary
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.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| 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
|
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CVE-2026-42582 (GCVE-0-2026-42582)
Vulnerability from cvelistv5 – Published: 2026-05-13 18:06 – Updated: 2026-05-13 19:35
VLAI
Title
Netty: HTTP/3 QPACK literal unbounded allocation
Summary
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.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| 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
|
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