What’s Vulnerable › Vulnerabilities

CVE-2024-43398: REXML denial of service vulnerability

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-22 · updated 2026-06-17
• Weakness: CWE-776

Description

REXML is an XML toolkit for Ruby. 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. The REXML gem 3.3.6 or later include the patch to fix the vulnerability.

Affected products

• NetApp Bootstrap Os: all versions
• ruby rexml: before 3.3.6 — fixed in 3.3.6

How to fix

Upgrade to a fixed version: ruby rexml 3.3.6. Check the vendor advisory for mitigations.

References

• https://github.com/ruby/rexml/releases/tag/v3.3.6
• https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
• https://lists.debian.org/debian-lts-announce/2025/01/msg00011.html
• https://security.netapp.com/advisory/ntap-20250103-0006/

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