medium5.3
CVE-2025-58767
REXML has DoS condition when parsing malformed XML file
Impact
### 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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | rexml | >= 3.3.3, <= 3.4.1 | 3.4.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Ruby-Lang | Rexml | from 3.3.3 before 3.4.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/ruby/rexml/commit/5859bdeac792687eaf93d8e8f0b7e3c1e2ed5c23
- https://github.com/ruby/rexml/security/advisories/GHSA-c2f4-jgmc-q2r5
- https://github.com/advisories/GHSA-c2f4-jgmc-q2r5
- https://www.ruby-lang.org/en/news/2025/09/18/dos-rexml-cve-2025-58767
- https://nvd.nist.gov/vuln/detail/CVE-2025-58767
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2025-58767.yml