CVE-2026-104477

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: Improper Neutralization of Input During Web Page Generation

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

The Showdown library (versions through 2.1.0 ) is vulnerable to Cross-Site Scripting (XSS) due to a flaw in the makehtml link and image subparsers. The root cause is the failure to properly sanitize or escape double quotes in destination URLs when rendering HTML attributes like href and src. A re...

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...

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...