CVE-2024-47220 Affecting ruby-webrick package, versions <1.8.1-1ubuntu1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.12% (32nd percentile)

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  • Snyk IDSNYK-UBUNTU2510-RUBYWEBRICK-13653128
  • published22 Oct 2025
  • disclosed22 Sept 2024

Introduced: 22 Sep 2024

CVE-2024-47220  (opens in a new tab)

How to fix?

Upgrade Ubuntu:25.10 ruby-webrick to version 1.8.1-1ubuntu1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby-webrick package and not the ruby-webrick package as distributed by Ubuntu. See How to fix? for Ubuntu:25.10 relevant fixed versions and status.

An issue was discovered in the WEBrick toolkit through 1.8.1 for Ruby. It allows HTTP request smuggling by providing both a Content-Length header and a Transfer-Encoding header, e.g., "GET /admin HTTP/1.1\r\n" inside of a "POST /user HTTP/1.1\r\n" request. NOTE: the supplier's position is "Webrick should not be used in production."

CVSS Base Scores

version 3.1