CVE-2026-42582
- Source
- https://cve.org/CVERecord?id=CVE-2026-42582
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42582.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-42582
- Aliases
- Downstream
- Related
- Published
- 2026-05-13T18:06:55.559Z
- Modified
- 2026-05-28T03:54:08.541035441Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- Netty: HTTP/3 QPACK literal unbounded allocation
- Details
-
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.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42582.json", "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-770", "CWE-789" ] }- References
Affected packages
Git / github.com/netty/netty
Affected versions
netty-4.*
netty-4.2.0.Alpha1
netty-4.2.0.Alpha2
netty-4.2.0.Alpha3
netty-4.2.0.Alpha4
netty-4.2.0.Alpha5
netty-4.2.0.Beta1
netty-4.2.0.Final
netty-4.2.0.RC1
netty-4.2.0.RC2
netty-4.2.0.RC3
netty-4.2.0.RC4
netty-4.2.1.Final
netty-4.2.10.Final
netty-4.2.11.Final
netty-4.2.12.Final
netty-4.2.2.Final
netty-4.2.3.Final
netty-4.2.4.Final
netty-4.2.5.Final
netty-4.2.6.Final
netty-4.2.7.Final
netty-4.2.8.Final
netty-4.2.9.Final