MEDIUM

CVE-2026-54386

2026-06-17 CVSS v3.1

CVSS

6.1

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.

Weakness (CWE)

CWE-79 Cross-site Scripting (XSS)

EPSS Score

0.24%

Probability of exploitation in next 30 days

15.3th percentile

References

https://github.com/marimo-team/marimo/commit/fdd55c8cf6260ae23bb411dc9d9269def5cf75d6 https://github.com/marimo-team/marimo/pull/9789 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

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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