KEV Entry

CVE-2026-39987

Known Exploited Vulnerability Entry Previdian

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Entry Details
Confirmed Exploited

CVE-2026-39987

2026-06-01 15:23 CEST

Timestamps

2026-06-01

2026-06-01

Scope

marimo Affected by Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass | Affected: Marimo-team / marimo | CVSS: 9.3 (CRITICAL) | EPSS: 0.37865 | Used in malware: unknown | Listed 1 day ahead of CISA KEV | Not yet in CISA KEV: False

References
  • {'id': 'CVE-2026-39987', 'url': 'https://www.cve.org/CVERecord?id=CVE-2026-39987'}
  • {'id': 'GHSA-2679-6MX9-H9XC', 'url': 'https://github.com/advisories/GHSA-2679-6MX9-H9XC'}
  • {'id': 'previdian', 'url': 'https://previdian.com/CVE-2026-39987'}

4cd1433f-12ad-41a5-bbff-eb6bdd4312b3

Previdian
caeb2787-0d58-4236-9039-7c86c3e566f3

2026-10-02 09:09 CEST

2026-10-02 09:09 CEST

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
public_report previdian successful_exploitation 0.70
View details 
{
  "added_date": "2026-06-01T13:23:39.702Z",
  "ahead_of_cisa_kev": {
    "count": 1,
    "unit": "day"
  },
  "cve_id": "CVE-2026-39987",
  "cvss_estimated": false,
  "cvss_score": 9.3,
  "cvss_severity": "CRITICAL",
  "epss_percentile": 0.98505,
  "epss_score": 0.37865,
  "feed": "Previdian (previdian.com)",
  "ghsa_id": "GHSA-2679-6MX9-H9XC",
  "not_yet_in_cisa_kev": false,
  "previous_ids": [],
  "product": "marimo",
  "title": "marimo Affected by Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass",
  "used_in_malware": "unknown",
  "vendor": "Marimo-team",
  "virtual_patch": false,
  "vulnerability_id": "CVE-2026-39987"
}
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