{"id":"AZL-94157","summary":"CVE-2026-6879 affecting package docbook5-style-xsl 1.79.2-11","details":"`Element.findall()` and fully-consumed `Element.iterfind()` exhibit `O(n^2)` time complexity when using XPath index predicates (e.g. `[1]`, `[last()]`, `[last()-N]`) on XML documents with many same-tag siblings. `Element.find()` is only affected when the first match is near the end  of the sibling list, such as with `[last()]` or `[last()-N]`;  `.//item[1]` short-circuits after the first match.","modified":"2026-09-18T05:34:49Z","published":"2026-07-28T15:17:51Z","upstream":["CVE-2026-6879"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6879"}],"affected":[{"package":{"name":"docbook5-style-xsl","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/docbook5-style-xsl"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.79.2-11"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-94157.json"}}],"schema_version":"1.9.0"}