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CVE-2024-43398 — Vulnerability in rexml — CVE Details

HIGH

REXML denial of service vulnerability

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

Summary

### Impact The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML that has many deep elements that have same local name attributes. If you need to parse untrusted XMLs with tree parser API like `REXML::Document.new`, you may be impacted to this vulnerability. If you use other parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected. ### Patches The REXML gem 3.3.6 or later include the patch to fix the vulnerability. ### Workarounds Don't parse untrusted XMLs with tree parser API. ### References * https://www.ruby-lang.org/en/news/2024/08/22/dos-rexml-cve-2024-43398/ : An announce on www.ruby-lang.org

Advisory Timeline

  • First published August 22, 2024 (781 days ago).
  • Last revised September 10, 2026 — 748 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update rexml to 3.3.6 or later
gem install rexml -v 3.3.6

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

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
rexml
rubygems
3.1.7.3, 3.1.8, 3.1.9, 3.1.9.1 (+16 more)3.3.6

Vulnerability Classification

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

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 5.9 score means for each attack dimension.

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

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

References

Frequently Asked Questions

What is CVE-2024-43398?
REXML denial of service vulnerability This vulnerability has been assigned a severity rating of HIGH (CVSS score: 5.9/10).
How do I check if my project is affected by CVE-2024-43398?
CVE-2024-43398 affects rexml. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2024-43398 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
5.9

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-vmwr-mc7x-5vc3

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