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CVE-2024-49761 — Vulnerability in rexml — CVE Details

MEDIUM

REXML ReDoS vulnerability

Published October 28, 2024Updated September 10, 2026Source: osv

Summary

### Impact The REXML gem before 3.3.9 has a ReDoS vulnerability when it parses an XML that has many digits between `&#` and `x...;` in a hex numeric character reference (`&#x...;`). This does not happen with Ruby 3.2 or later. Ruby 3.1 is the only affected maintained Ruby. Note that Ruby 3.1 will reach EOL on 2025-03. ### Patches The REXML gem 3.3.9 or later include the patch to fix the vulnerability. ### Workarounds Use Ruby 3.2 or later instead of Ruby 3.1. ### References * https://www.ruby-lang.org/en/news/2024/10/28/redos-rexml-cve-2024-49761/: An announce on www.ruby-lang.org

Advisory Timeline

  • First published October 28, 2024 (714 days ago).
  • Last revised September 10, 2026 — 682 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update rexml to 3.3.9 or later
gem install rexml -v 3.3.9

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 (+19 more)3.3.9

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
None
Availability
High

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

References

Frequently Asked Questions

What is CVE-2024-49761?
REXML ReDoS vulnerability This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2024-49761?
CVE-2024-49761 affects rexml. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2024-49761 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-2rxp-v6pw-ch6m
CVE-2025-10990

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