REXML denial of service vulnerability
ImpactThe REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML that has many deep elements that have same local name attributes.If you need to parse untrusted XMLs with tree parser API like `REXML::Document.new`, you may be impacted to this vulnerability. If you use other parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected.PatchesThe REXML gem 3.3.6 or later include the patch to fix the vulnerability.WorkaroundsDon't parse untrusted XMLs with tree parser API.Referenceshttps://www.ruby-lang.org/en/news/2024/08/22/dos-rexml-cve-2024-43398/ : An announce on www.ruby-lang.org