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CVE-2026-39987: Marimo Remote Code Execution

Status: KEV  |  Advisory ID: CVE-2026-39987

Key Details

CVECVE-2026-39987
Affected productsMarimo Marimo
Exploitation statusListed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified asCWE-306 (Missing Authentication for Critical Function)
KEV listingAdded to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-04-23.
Exploitation prediction (EPSS)100% probability of exploitation in the next 30 days (100% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline2026-05-07 (CISA KEV, Binding Operational Directive).

What to Know

Marimo contains an pre-authorization remote code execution vulnerability, allowing an unauthenticated attacked to shell access and execute arbitrary system commands.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-39987