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 int…
Published: 2026-10-02 · CVSS: 5.3 · CVSS 4.0
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 onmouseover handlers to execute script when victims view rendered HTML.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7