CVE-2026-39987
Marimo Remote Code Execution Vulnerability
9.3
CVSS 4.0
37.9 %
EPSS (current)
2026-04-23
KEV addition
No
Ransomware
Timeline
Publication, first public exploit and KEV addition on a day axis.
Key facts
Vendor / product: Marimo / Marimo
Published: 2026-04-09 · Due (CISA): 2026-05-07
CWE: CWE-306 · EU list: no
Exploit references (metadata only)
| Source | Reference | Title | Date |
|---|---|---|---|
| nuclei | javascript/cves/2026/CVE-2026-39987.yaml | Marimo <= 0.20.4 - Pre-Auth Terminal WebSocket RCE | – |
| exploitdb | 52673 | Marimo 0.20.4 - RCE | 2026-09-02 |
References only — no downloads or instructions.