CVE-2026-48043Medium· 5.3▾ SunlitNetty is a network application framework for development of protocol servers and clients. In netty-codec-http2 prior to versions 4.1.135.Final and 4.2.15.Final, the `DelegatingDecompressorFrameListener` class orchestrates HTTP/2 decompre…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0.2 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Jul 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.6%
Last analysed / modified upstream
0.6% → 0.8%
Netty is a network application framework for development of protocol servers and clients. In netty-codec-http2 prior to versions 4.1.135.Final and 4.2.15.Final, the DelegatingDecompressorFrameListener class orchestrates HTTP/2 decompression by embedding a per-stream EmbeddedChannel that runs the appropriate decompression codec (gzip, deflate, zstd) and forwards decompressed chunks to a wrapped listener. Each decompressed chunk is a pooled ByteBuf handed to an anonymous ChannelInboundHandlerAdapter tail handler, which becomes the sole owner responsible for releasing it. A remote peer could send frames that would result in the flow-controller throwing and so trigger a resource leak which at the end might take down the whole JVM due OOME. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
netty < 4.1.135netty >= 4.2.0, < 4.2.15Upgrade past the affected range:
netty 4.2.15Affected packages:
io.netty:netty-codec-http2 <= 4.1.134.Finalio.netty:netty-codec-http2 >= 4.2.0.Alpha1, <= 4.2.14.FinalPatched in:
io.netty:netty-codec-http2 4.1.135.Finalio.netty:netty-codec-http2 4.2.15.FinalSource: https://github.com/advisories/GHSA-c2gf-v879-257j
Connected by shared product, vendor, weakness, or advisory.
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