CVE-2026-47103

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.

Affected products

Statemachine

Fgmacedo Python Statemachine

< 3.2.0

Fix

Available

CVSS 3.1

9.8 CRITICAL

EPSS

1.2% (65th percentile)

Weakness

CWE-94, CWE-95

NVD status

Analyzed

Published

2026-06-17