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CVE-2024-47220 — HTTP Request Smuggling in webrick — CVE Details

HIGH

HTTP Request Smuggling in ruby webrick

Published September 22, 2024Updated September 10, 2026Source: osv

Summary

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."

Advisory Timeline

  • First published September 22, 2024 (750 days ago).
  • Last revised September 10, 2026 — 718 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update webrick to 1.8.2 or later
gem install webrick -v 1.8.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
webrick
rubygems
1.3.1, 1.4.0, 1.4.0.beta1, 1.4.1 (+10 more)1.8.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Frequently Asked Questions

What is CVE-2024-47220?
HTTP Request Smuggling in ruby webrick This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2024-47220?
CVE-2024-47220 affects webrick. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2024-47220 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-6f62-3596-g6w7

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