CVE-2024-49761
CWE-1333Published: October 28, 2024· Updated: Jun 17, 2026
Official Description
REXML is an XML toolkit for Ruby. 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. The REXML gem 3.3.9 or later include the patch to fix the vulnerability.
Technical Analysis
CVE-2024-49761 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (5)
Quick Facts
Related CVEs (CWE-1333)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2024-49761 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts