Resource exhaustion in Ruby Rexml
CVE-2025-58767
REXML is an XML toolkit for Ruby. The REXML gems from 3.3.3 to 3.4.1 has a DoS vulnerability when parsing XML containing multiple XML declarations. If you need to parse untrusted XMLs, you may be impacted to these vulnerabilities. The REXM…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.002 (14.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Ruby Rexml — versions >= 3.3.3, < 3.4.2
- Ruby-lang Rexml
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-58767?
- CVE-2025-58767 is a medium-severity vulnerability in Ruby Rexml, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2025-09-17.
- How severe is CVE-2025-58767?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-58767 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.