HTTP Request Smuggling Affecting candlepin-selinux package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.24% (14th percentile)

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  • Snyk IDSNYK-RHEL10-CANDLEPINSELINUX-20295460
  • published30 Sept 2026
  • disclosed26 Sept 2026

Introduced: 26 Sep 2026

NewCVE-2026-100666  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 candlepin-selinux.

NVD Description

Note: Versions mentioned in the description apply only to the upstream candlepin-selinux package and not the candlepin-selinux package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

Netty's HttpServerCodec (io.netty:netty-codec-http) in versions 4.2.0.Final through 4.2.16.Final and in versions up to and including 4.1.136.Final pairs each outbound response with an inbound request by calling pollMethod() once per response, including for 1xx informational responses. If a client pipelines an HTTP/1.1 GET carrying an Expect: 100-continue header followed by a HEAD request, the 100 Continue response consumes the queued GET method, so the subsequent 200 OK for the GET is paired with HEAD and its body is dropped, while the following 200 OK for the HEAD request is written with a body. This desynchronizes HTTP parsing on the connection: the GET entity is never delivered and the HEAD response body is interpreted as the GET body, resulting in response splitting and unsafe connection reuse. Fixed in 4.2.17.Final and 4.1.137.Final.

CVSS Base Scores

version 3.1