This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-59903 →

DEBIAN-CVE-2026-59903

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.http.cors.CorsHa...

Original description

The description as published by the source.

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.http.cors.CorsHandler setVaryHeader replaces application Vary headers such as Authorization or Cookie with Origin, allowing a caching proxy or CDN to reuse authenticated responses across users and disclose sensitive information. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.

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