Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-41591

Marko is a declarative, HTML-based language for building web apps. Prior to marko version 5.38.36 and prior to @marko/runtime-tags 6.0.164, when dynamic text is interpolated into a <script> or <style> tag the Marko runtime failed to prevent tag breakout when the closing tag used non-lowercase casing. An attacker able to place input inside a <script> or <style> block could break out of the tag with </SCRIPT>, </Style>, etc. and inject arbitrary HTML/JavaScript, resulting in cross-site scripting. This issue has been patched in marko version 5.38.36 and @marko/runtime-tags 6.0.164.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 13.2%
CVSS Severity
CVSS v3 Score 6.4
Products affected by CVE-2026-41591


Contact Us

Shodan ® - All rights reserved