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Netty Codecs SPDY Zlib Header Block Truncation Vulnerability (CVE-2020-56833) Advisory and POC

github.com 2026-07-21 查看中文 →
Security Advisory CVE-2020-56833 Critical Netty
Affected:
  • io.netty:netty-codec-http >=4.2.0.Final, <=4.2.16.Final
  • io.netty:netty-codec-http >=4.1.0.Final, <=4.1.135.Final
Fixed in:
  • 4.2.16.Final
  • 4.1.136.Final
Referenced CVEs: CVE-2026-55833 · 7.5
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