CVE-2026-59903

Description

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.

References

https://github.com/netty/netty/security/advisories/GHSA-8c42-7qj2-3j46

https://github.com/netty/netty/releases/tag/netty-4.2.17.Final

https://github.com/netty/netty/releases/tag/netty-4.1.137.Final

https://github.com/netty/netty/pull/17217

https://github.com/netty/netty/pull/17213

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3