CVE-2026-75149
Unauthenticated code injection in marimo notebooks executes local commands.
Is CVE-2026-75149 being exploited?
Not confirmed. CVE-2026-75149 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.64% probability of exploitation in the next 30 days.
How severe is CVE-2026-75149?
CVE-2026-75149 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-75149?
Yes. A fix has been recorded for CVE-2026-75149. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-75149 affect?
CVE-2026-75149 affects marimo < 0.23.15, marimo notebooks opened in edit mode. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-75149?
Update to marimo >=0.23.15; avoid opening untrusted notebooks; restrict notebook sources.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attackers can execute arbitrary local commands by embedding a crafted MCP entry; triggers when notebook opened in edit mode without auth.
Immediate action required
- affected< 0.23.15
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.