{"id":"AZL-91077","summary":"CVE-2026-57436 affecting package rubygem-nokogiri for versions less than 1.19.4-1","details":"Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::Document#root= validated only that the new root was a Nokogiri::XML::Node, allowing a DTD node to be set as the document root. The result is a heap use-after-free during garbage collection or finalization, leading to an invalid memory read or potentially a segfault. This vulnerability is fixed in 1.19.4.","modified":"2026-08-28T17:48:11.887214106Z","published":"2026-06-25T15:16:41Z","upstream":["CVE-2026-57436"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-57436"}],"affected":[{"package":{"name":"rubygem-nokogiri","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/rubygem-nokogiri"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.4-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-91077.json"}}],"schema_version":"1.9.0"}