CVE-2026-47103

CriticalCVSS 9.8/10Last modified Oct 8, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-95 CWE-94

Affected software

No affected versions have been published.

Timeline

Published: Jun 17, 2026
Last modified: Oct 8, 2026
NVD status: Modified

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