CVE-2026-47103
Critical
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 `<data expr="...">` 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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductFgmacedo Python Statemachine
PublishedJun 17, 2026
First seenJun 17, 2026
Weakness typeCWE-95CWE-95
How to fix
Update
- fgmacedo python_statemachine3.2.0 or later
- python-statemachine3.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| fgmacedo python_statemachine | 3.0.0 ≤ v < 3.2.0 | 3.2.0 |
| python-statemachinePyPI | 3.0.0 ≤ v < 3.2.0 | 3.2.0 |
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