GHSA-c2f4-jgmc-q2r5

REXML has DoS condition when parsing malformed XML file

Source: GitHub Advisory Database (reviewed) Low CVE-2025-58767

Packages

Ecosystem	Package	Affected	Fixed in
RubyGems	rexml	>= 3.3.3, < 3.4.2	3.4.2

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact The REXML gems from 3.3.3 to 3.4.1 have a DoS vulnerability when parsing XML containing multiple XML declarations. If you need to parse untrusted XMLs, you may be impacted to these vulnerabilities. ### Patches REXML gems 3.4.2 or later include the patches to fix these vulnerabilities. ### Workarounds Don't parse untrusted XMLs. ### References * https://www.ruby-lang.org/en/news/2025/09/18/dos-rexml-cve-2025-58767/ : An announcement on www.ruby-lang.org

References

External links from the advisory. They lead to third-party sites.

https://github.com/ruby/rexml/security/advisories/GHSA-c2f4-jgmc-q2r5 web
https://nvd.nist.gov/vuln/detail/CVE-2025-58767 advisory
https://github.com/ruby/rexml/commit/5859bdeac792687eaf93d8e8f0b7e3c1e2ed5c23 web
https://github.com/ruby/rexml package
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2025-58767.yml web
https://www.ruby-lang.org/en/news/2025/09/18/dos-rexml-cve-2025-58767 web