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High severity7.5NVD Advisory· Published Jun 12, 2026· Updated Jun 15, 2026

CVE-2026-44892

CVE-2026-44892

Description

Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, the default configuration of the Http3ConnectionHandler in the Netty HTTP/3 codec lacks an enforced maximum header size limit. When a peer does not explicitly specify HTTP3_SETTINGS_MAX_FIELD_SECTION_SIZE, the implementation defaults to an unbounded limit. This insecure default configuration allows a malicious client or server to send an enormous number of headers, leading to a memory exhaustion Denial of Service via an OutOfMemoryError. Version 4.2.15.Final contains a patch.

AI Insight

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
io.netty:netty-codec-http3Maven
>= 4.2.0.Final, < 4.2.15.Final4.2.15.Final

Affected products

36

Patches

Vulnerability mechanics

References

4

News mentions

2