{"action":"Upgrade marko to 5.38.36 or later.","affected":[{"fixed":"5.38.36","introduced":"0"}],"component":"marko","cve_ids":["CVE-2026-41591"],"ecosystem":"npm","epss":0.00227,"exploited":false,"fixed_versions":["5.38.36"],"ghsa_id":"GHSA-x9fj-57fh-c8wq","id":"tcs_01M5KGHGFKK7P20376Q7REGQ3F","modified_at":"2026-05-13T13:54:56.772894Z","published_at":"2026-04-22T19:55:51Z","references":["https://osv.dev/vulnerability/GHSA-x9fj-57fh-c8wq","https://github.com/marko-js/marko/security/advisories/GHSA-x9fj-57fh-c8wq","https://nvd.nist.gov/vuln/detail/CVE-2026-41591","https://github.com/marko-js/marko"],"severity":{"label":"medium","score":6.4},"sources":[{"source":"osv","source_id":"GHSA-x9fj-57fh-c8wq","url":"https://osv.dev/vulnerability/GHSA-x9fj-57fh-c8wq"}],"summary":"Marko: XSS via case-insensitive script/style closing tag bypass in runtime HTML escaping"}