EUVD-2026-91853

Showdown through 2.1.0 contains a cross-site scripting vulnerability in the makehtml link and image subparsers, which fail to escape double quotes in destination URLs placed into href and src attributes. Attackers can craft markdown links or images containing a double quote followed by onerror or...

CVE-2026-104477 Showdown through 2.1.0 XSS via unescaped quote in href and src attributes

Showdown through 2.1.0 contains a cross-site scripting vulnerability in the makehtml link and image subparsers, which fail to escape double quotes in destination URLs placed into href and src attributes. Attackers can craft markdown links or images containing a double quote followed by onerror or...

PT-2026-104459

Name of the Vulnerable Software and Affected Versions Showdown versions prior to 2.1.1 Description Cross-site scripting occurs in the makehtml link and image subparsers due to a failure to escape double quotes in destination URLs used within href and src attributes. This allows attackers to creat...