{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-39987",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-08T00:01:47.629Z",
        "datePublished": "2026-04-09T17:16:55.639Z",
        "dateUpdated": "2026-04-24T03:55:20.777Z"
    },
    "containers": {
        "cna": {
            "title": "marimo Affected by Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-306",
                            "lang": "en",
                            "description": "CWE-306: Missing Authentication for Critical Function",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc"
                },
                {
                    "name": "https://github.com/marimo-team/marimo/pull/9098",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/marimo-team/marimo/pull/9098"
                },
                {
                    "name": "https://github.com/marimo-team/marimo/commit/c24d4806398f30be6b12acd6c60d1d7c68cfd12a",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/marimo-team/marimo/commit/c24d4806398f30be6b12acd6c60d1d7c68cfd12a"
                }
            ],
            "affected": [
                {
                    "vendor": "marimo-team",
                    "product": "marimo",
                    "versions": [
                        {
                            "version": "< 0.23.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-04-09T17:16:55.639Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "marimo is a reactive Python notebook. Prior to 0.23.0, Marimo has a Pre-Auth RCE vulnerability. The terminal WebSocket endpoint /terminal/ws lacks authentication validation, allowing an unauthenticated attacker to obtain a full PTY shell and execute arbitrary system commands. Unlike other WebSocket endpoints (e.g., /ws) that correctly call validate_auth() for authentication, the /terminal/ws endpoint only checks the running mode and platform support before accepting connections, completely skipping authentication verification. This vulnerability is fixed in 0.23.0."
                }
            ],
            "source": {
                "advisory": "GHSA-2679-6mx9-h9xc",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://www.sysdig.com/blog/marimo-oss-python-notebook-rce-from-disclosure-to-exploitation-in-under-10-hours",
                        "tags": [
                            "third-party-advisory"
                        ]
                    },
                    {
                        "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39987",
                        "tags": [
                            "government-resource"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-23T00:00:00+00:00",
                                "options": [
                                    {
                                        "Exploitation": "active"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3",
                                "id": "CVE-2026-39987"
                            }
                        }
                    },
                    {
                        "other": {
                            "type": "kev",
                            "content": {
                                "dateAdded": "2026-04-23",
                                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39987"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-04-24T03:55:20.777Z"
                },
                "timeline": [
                    {
                        "time": "2026-04-23T00:00:00.000Z",
                        "lang": "en",
                        "value": "CVE-2026-39987 added to CISA KEV"
                    }
                ]
            }
        ]
    }
}