CVE-2026-48748: Netty HTTP/3 QPACK Blocked Streams Memory Exhaustion

June 15, 2026

A memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error.

References

github.com/advisories/GHSA-4grm-h2qv-h6w6
github.com/netty/netty/releases/tag/netty-4.2.15.Final
github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6
nvd.nist.gov/vuln/detail/CVE-2026-48748

Code Behaviors & Features

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