HTTP Request Smuggling Affecting eap8-netty-buffer package, versions <0:4.1.138-1.Final_redhat_00001.1.el8eap


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.32% (26th percentile)

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  • Snyk IDSNYK-RHEL8-EAP8NETTYBUFFER-21954283
  • published30 Oct 2026
  • disclosed17 Aug 2026

Introduced: 17 Aug 2026

CVE-2026-59903  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade RHEL:8 eap8-netty-buffer to version 0:4.1.138-1.Final_redhat_00001.1.el8eap or higher.
This issue was patched in RHSA-2026:92057.

NVD Description

Note: Versions mentioned in the description apply only to the upstream eap8-netty-buffer package and not the eap8-netty-buffer package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1