CVE-2026-54386 — marimo < 0.23.9 XSS via file Query Parameter in assets.py
marimo before 0.23.9 contains a reflected cross-site scripting vulnerability in the notebook page that allows unauthenticated attackers to inject arbitrary JavaScript by exploit…
Published: 2026-06-17 · CVSS: 5.1 · CVSS 4.0
marimo before 0.23.9 contains a reflected cross-site scripting vulnerability in the notebook page that allows unauthenticated attackers to inject arbitrary JavaScript by exploiting improper escaping of single quotes in the file query parameter reflected into an inline JavaScript string literal. Attackers can craft a malicious link with a payload beginning with __new__ to bypass the 404 check and inject JavaScript into the page, which executes without Content-Security-Policy restrictions in the origin of a victim's marimo server.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7