marimo-team/marimo · Security
marimo contains a reflected cross-site scripting vulnerability in the notebook page
- GHSA ID
- GHSA-8m59-7xv8-735h
- CVE ID
- CVE-2026-54386
- Severity
- medium
- Published
- Updated
- CVSS
- 6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CVSS v3
- 6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CVSS v4
- 5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Description
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.
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-54386 ↗
- https://github.com/marimo-team/marimo/pull/9789 ↗
- https://github.com/marimo-team/marimo/commit/fdd55c8cf6260ae23bb411dc9d9269def5cf75d6 ↗
- https://github.com/marimo-team/marimo/releases/tag/0.23.9 ↗
- https://www.vulncheck.com/advisories/marimo-xss-via-file-query-parameter-in-assets-py ↗
- https://github.com/advisories/GHSA-8m59-7xv8-735h ↗