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CVE-2026-44892

Netty has a Vulnerable Default Configuration Which Leads to Denial of Service via Unbounded HTTP/3 Header Size PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
netty / nettyaffected >= 4.2.0.Final, < 4.2.15.Final

CWE

CWE-400, CWE-1188

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.