{"id":"CVE-2026-47103","aliases":["EUVD-2026-37730","GHSA-v4jc-pm6r-3vj8","PYSEC-2026-506"],"status":"published","title":"Python StateMachine 3.0.0 \u003c 3.2.0 RCE via SCXML eval() Injection","description":"Python StateMachine versions 3.0.0 before 3.2.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary code by supplying malicious SCXML documents containing crafted `\u003cdata expr=\"...\"\u003e` attributes evaluated unsafely. The SCXMLProcessor passes attacker-controlled expression strings through a call chain ending in Python's built-in eval() without sandboxing, enabling arbitrary code execution in the context of the hosting process.","severity":{"version":"4.0","score":9.3,"vector":"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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01363,"percentile":0.72014,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-94","CWE-95"],"published":"2026-06-17T14:32:08Z","modified":"2026-11-08T14:04:04Z","exploits":[{"source":"pocgithub","id":"SaiTeja-Erukude/CVE-2026-47103-python-statemachine-rce","title":"SaiTeja-Erukude/CVE-2026-47103-python-statemachine-rce","date":"2026-08-15","url":"https://github.com/SaiTeja-Erukude/CVE-2026-47103-python-statemachine-rce"}],"fixes":[{"ecosystem":"PyPI","package":"python-statemachine","fixed_in":["3.2.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"python-statemachine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.2.0"}]}]},{"source":"osv","ecosystem":"PyPI","package":"python-statemachine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.2.0"}]}],"versions":["3.0.0","3.1.0","3.1.1","3.1.2"]},{"source":"osv","ecosystem":"PyPI","package":"python-statemachine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.2.0"}]}],"versions":["3.0.0","3.1.0","3.1.1","3.1.2"]}],"products":[{"vendor":"fgmacedo","product":"python-statemachine"},{"vendor":"fgmacedo","product":"python_statemachine"}],"references":[{"url":"https://github.com/SaiTeja-Erukude/CVE-2026-47103-python-statemachine-rce","tags":["technical-description","exploit","evidence"]},{"url":"https://github.com/fgmacedo/python-statemachine/releases/tag/v3.2.0","tags":["release-notes","Release Notes","advisory","web"]},{"url":"https://github.com/fgmacedo/python-statemachine/security/advisories/GHSA-v4jc-pm6r-3vj8","tags":["vendor-advisory","exploit","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://www.vulncheck.com/advisories/python-statemachine-rce-via-scxml-eval-injection","tags":["third-party-advisory","Third Party Advisory","VDB Entry","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47103","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-v4jc-pm6r-3vj8","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47103.json","tags":["advisory"]},{"url":"https://github.com/fgmacedo/python-statemachine","tags":["package"]},{"url":"https://pypi.org/project/python-statemachine","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-47103","title":"Python StateMachine 3.0.0 \u003c 3.2.0 RCE via SCXML eval() Injection","description":"Python StateMachine versions 3.0.0 before 3.2.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary code by supplying malicious SCXML documents containing crafted `\u003cdata expr=\"...\"\u003e` attributes evaluated unsafely. The SCXMLProcessor passes attacker-controlled expression strings through a call chain ending in Python's built-in eval() without sandboxing, enabling arbitrary code execution in the context of the hosting process.","status":"published","published":"2026-06-17T14:32:08.18Z","modified":"2026-11-08T14:04:04.343Z","cvss":[{"version":"4.0","score":9.3,"vector":"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","level":"critical","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-95"],"updated_at":"2026-11-08T15:43:33.322657Z"}],"euvd":[{"id":"EUVD-2026-37730","description":"Python StateMachine versions 3.0.0 before 3.2.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary code by supplying malicious SCXML documents containing crafted `\u003cdata expr=\"...\"\u003e` attributes evaluated unsafely. The SCXMLProcessor passes attacker-controlled expression strings through a call chain ending in Python's built-in eval() without sandboxing, enabling arbitrary code execution in the context of the hosting process.","status":"published","published":"2026-06-17T14:32:08Z","modified":"2026-11-08T14:04:04Z","cvss":[{"version":"4.0","score":9.3,"vector":"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","level":"critical"}],"updated_at":"2026-11-08T15:13:08.77824Z"}],"ghsa":[{"id":"GHSA-v4jc-pm6r-3vj8","title":"python-statemachine SCXML \u003cdata expr\u003e Eval Injection","description":"### Summary\n\npython-statemachine 3.1.2 evaluates `\u003cdata expr=\"...\"\u003e` attributes in SCXML documents using Python's `eval()`. Any application that passes attacker-controlled SCXML content to `SCXMLProcessor` is vulnerable to arbitrary code execution in the context of the hosting process.\n\n### Details\n\n`SCXMLProcessor.parse_scxml_file()` processes SCXML documents and evaluates `\u003cdata\u003e` element `expr` attributes via the following call chain:\n\n```\nSCXMLProcessor.parse_scxml_file()\nSCXMLProcessor.process_definition()\ncreate_datamodel_action_callable()\n_create_dataitem_callable()\n_eval()\neval()\n```\n\n`_eval()` calls Python's built-in `eval()` directly on the expression string without sandboxing or restriction.\n\n### PoC\n\n```\n1. Install:\n   pip install python-statemachine==3.1.2\n\n2. Create an SCXML file containing:\n   \u003cdata id=\"x\" expr=\"__import__('pathlib').Path('marker.txt').write_text('pwned')\"/\u003e\n\n3. Run:\n   SCXMLProcessor.parse_scxml_file(DATA_EXPR_CHART)\n   SCXMLProcessor.start()\n\n4. During start(), \u003cdata expr\u003e reaches _eval(), which calls eval().\n\n5. Result:\n   data_marker_before_start: False\n   data_marker_after_start: True\n   success: True\n```\n\n### Impact\n\nThis is an eval injection vulnerability (CWE-95). Remote or local code execution depending on whether the consuming application accepts SCXML content from remote users, uploaded files, configuration, plugins, or other untrusted sources.","status":"published","published":"2026-06-18T14:28:02Z","modified":"2026-06-18T14:28:03Z","cvss":[{"version":"4.0","score":9.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-95"],"updated_at":"2026-11-02T14:40:29.43528Z"}],"nvd":[{"id":"CVE-2026-47103","description":"Python StateMachine versions 3.0.0 before 3.2.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary code by supplying malicious SCXML documents containing crafted `\u003cdata expr=\"...\"\u003e` attributes evaluated unsafely. The SCXMLProcessor passes attacker-controlled expression strings through a call chain ending in Python's built-in eval() without sandboxing, enabling arbitrary code execution in the context of the hosting process.","status":"published","published":"2026-06-17T15:16:58.46Z","modified":"2026-10-26T12:10:00.13Z","cvss":[{"version":"4.0","score":9.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-95","CWE-94"],"updated_at":"2026-11-02T14:12:24.544761Z"}],"osv":[{"id":"CVE-2026-47103","title":"Python StateMachine 3.0.0 \u003c 3.2.0 RCE via SCXML eval() Injection","description":"Python StateMachine versions 3.0.0 before 3.2.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary code by supplying malicious SCXML documents containing crafted `\u003cdata expr=\"...\"\u003e` attributes evaluated unsafely. The SCXMLProcessor passes attacker-controlled expression strings through a call chain ending in Python's built-in eval() without sandboxing, enabling arbitrary code execution in the context of the hosting process.","status":"published","published":"2026-06-17T14:32:08.18Z","modified":"2026-11-09T02:31:12.498007236Z","cvss":[{"version":"4.0","score":9.3,"vector":"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","level":"critical"}],"cwes":["CWE-95"],"updated_at":"2026-11-09T03:16:44.651171Z"},{"id":"GHSA-v4jc-pm6r-3vj8","title":"python-statemachine SCXML \u003cdata expr\u003e Eval Injection","description":"### Summary\n\npython-statemachine 3.1.2 evaluates `\u003cdata expr=\"...\"\u003e` attributes in SCXML documents using Python's `eval()`. Any application that passes attacker-controlled SCXML content to `SCXMLProcessor` is vulnerable to arbitrary code execution in the context of the hosting process.\n\n### Details\n\n`SCXMLProcessor.parse_scxml_file()` processes SCXML documents and evaluates `\u003cdata\u003e` element `expr` attributes via the following call chain:\n\n```\nSCXMLProcessor.parse_scxml_file()\nSCXMLProcessor.process_definition()\ncreate_datamodel_action_callable()\n_create_dataitem_callable()\n_eval()\neval()\n```\n\n`_eval()` calls Python's built-in `eval()` directly on the expression string without sandboxing or restriction.\n\n### PoC\n\n```\n1. Install:\n   pip install python-statemachine==3.1.2\n\n2. Create an SCXML file containing:\n   \u003cdata id=\"x\" expr=\"__import__('pathlib').Path('marker.txt').write_text('pwned')\"/\u003e\n\n3. Run:\n   SCXMLProcessor.parse_scxml_file(DATA_EXPR_CHART)\n   SCXMLProcessor.start()\n\n4. During start(), \u003cdata expr\u003e reaches _eval(), which calls eval().\n\n5. Result:\n   data_marker_before_start: False\n   data_marker_after_start: True\n   success: True\n```\n\n### Impact\n\nThis is an eval injection vulnerability (CWE-95). Remote or local code execution depending on whether the consuming application accepts SCXML content from remote users, uploaded files, configuration, plugins, or other untrusted sources.","status":"published","published":"2026-06-18T14:28:02Z","modified":"2026-06-29T12:26:35.363159595Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"version":"4.0","score":9.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"}],"cwes":["CWE-95"],"updated_at":"2026-11-02T15:46:56.639206Z"},{"id":"PYSEC-2026-506","title":"python-statemachine SCXML \u003cdata expr\u003e Eval Injection","description":"### Summary\n\npython-statemachine 3.1.2 evaluates `\u003cdata expr=\"...\"\u003e` attributes in SCXML documents using Python's `eval()`. Any application that passes attacker-controlled SCXML content to `SCXMLProcessor` is vulnerable to arbitrary code execution in the context of the hosting process.\n\n### Details\n\n`SCXMLProcessor.parse_scxml_file()` processes SCXML documents and evaluates `\u003cdata\u003e` element `expr` attributes via the following call chain:\n\n```\nSCXMLProcessor.parse_scxml_file()\nSCXMLProcessor.process_definition()\n create_datamodel_action_callable()\n_create_dataitem_callable()\n_eval()\neval()\n ```\n\n`_eval()` calls Python's built-in `eval()` directly on the expression string without sandboxing or restriction.\n\n### PoC\n\n```\n1. Install:\n   pip install python-statemachine==3.1.2\n\n2. Create an SCXML file containing:\n   \u003cdata id=\"x\" expr=\"__import__('pathlib').Path('marker.txt').write_text('pwned')\"/\u003e\n\n 3. Run:\n   SCXMLProcessor.parse_scxml_file(DATA_EXPR_CHART)\n   SCXMLProcessor.start()\n \n4. During start(), \u003cdata expr\u003e reaches _eval(), which calls eval().\n\n5. Result:\n   data_marker_before_start: False\n   data_marker_after_start: True\n   success: True\n```\n\n### Impact\n\nThis is an eval injection vulnerability (CWE-95). Remote or local code execution depending on whether the consuming application accepts SCXML content from remote users, uploaded files, configuration, plugins, or other untrusted sources.","status":"published","published":"2026-06-29T11:50:52.079977Z","modified":"2026-07-01T20:23:03.302193Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"version":"4.0","score":9.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"}],"updated_at":"2026-11-02T15:52:57.671918Z"}]}}