{"cve":"CVE-2026-54386","nvd":{"published":"2026-06-17T22:16:24.690","modified":"2026-10-26T11:10:00.157","status":"Deferred","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.","cvss_v4":{"vector":"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","score":5.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-26T11:33:08.859761529+00:00"},"epss":{"cve":"CVE-2026-54386","score":0.00239,"percentile":0.14866,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-8m59-7xv8-735h","url":"https://osv.dev/vulnerability/GHSA-8m59-7xv8-735h","summary":"marimo contains a reflected cross-site scripting vulnerability in the notebook page","modified":"2026-07-13T16:43:20.650813439Z","packages":[{"ecosystem":"PyPI","name":"marimo","purl":"pkg:pypi/marimo","ranges":["<0.23.9"],"fixed":["0.23.9"]}]},{"id":"PYSEC-2026-2619","url":"https://osv.dev/vulnerability/PYSEC-2026-2619","summary":"marimo contains a reflected cross-site scripting vulnerability in the notebook page","modified":"2026-07-13T16:32:12.434722819Z","packages":[{"ecosystem":"PyPI","name":"marimo","purl":"pkg:pypi/marimo","ranges":["<0.23.9"],"fixed":["0.23.9"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}