CVE-2026-39987
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
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EPSS — probability of exploitation (30 days)
98.9%
99.9th percentile
CISA KEV
Listed
Added 2026-04-23 · patch by 2026-05-07
Weakness / dates
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Published — · modified —
Timeline
- 2026-04-23 — Added to CISA KEV (actively exploited)
- 2026-05-07 — CISA patch-by deadline
Description
Marimo contains an pre-authorization remote code execution vulnerability, allowing an unauthenticated attacked to shell access and execute arbitrary system commands.