RCE in Marimo-Team Marimo
CVE-2026-75149
marimo before 0.23.15 contains a code injection vulnerability in the notebook configuration handler that allows attackers to execute arbitrary commands by supplying a crafted MCP server entry with an attacker-controlled command value embedded in a notebook. When the notebook is opened in edit mode, marimo launches the specified command as a local subprocess before any notebook cell is executed, requiring no authentication or cell execution to trigger the vulnerability.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (60.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.010 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/marimo-team/marimo/releases/tag/0.23.15 (release-notes)
- github.com/marimo-team/marimo/pull/10281 (issue-tracking)
- github.com/marimo-team/marimo/commit/1a21bd71e258438d2511136b5edacc94c08855f4 (patch)
- www.vulncheck.com/advisories/marimo-code-injection-via-mcp-server-configuration (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75149?
- CVE-2026-75149 is a high-severity vulnerability in Marimo-Team Marimo, classified under Code Injection. CVSS score: 8.8/10. Published 2026-08-19.
- How severe is CVE-2026-75149?
- High severity. CVSS v3 base score is 8.8 out of 10.