This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-89044 →

DEBIAN-CVE-2026-89044

Netty versions 4.1.133.Final through 4.1.137.Final and 4.2.13.Final through 4.2.17.Final fail to properly validate the final transfer coding in the Tr...

Original description

The description as published by the source.

Netty versions 4.1.133.Final through 4.1.137.Final and 4.2.13.Final through 4.2.17.Final fail to properly validate the final transfer coding in the Transfer-Encoding header, allowing attackers to smuggle requests by using malformed encoding declarations. Attackers can split Transfer-Encoding headers across multiple lines or use values like 'chunked, xchunked' to bypass validation and decode messages as chunked when the final coding is not chunked, enabling request smuggling attacks.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 netty

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 netty

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 netty

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

References

advisory security-tracker.debian.org