HTTP Request Smuggling Affecting ruby4.0 package, versions <0:4.0.0-33.3.hum1


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.27% (51st percentile)

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  • Snyk IDSNYK-RHEL10-RUBY40-16079888
  • published16 Apr 2026
  • disclosed29 Sept 2020

Introduced: 29 Sep 2020

CVE-2020-25613  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade RHEL:10 ruby4.0 to version 0:4.0.0-33.3.hum1 or higher.
This issue was patched in RHSA-2026:8838.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby4.0 package and not the ruby4.0 package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack.

CVSS Base Scores

version 3.1