Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.012
EPSS Ranking 64.1%
CVSS Severity
CVSS v3 Score 9.8
References
- https://github.com/fgmacedo/python-statemachine/releases/tag/v3.2.0
- https://github.com/fgmacedo/python-statemachine/security/advisories/GHSA-v4jc-pm6r-3vj8
- https://www.vulncheck.com/advisories/python-statemachine-rce-via-scxml-eval-injection
- https://github.com/fgmacedo/python-statemachine/security/advisories/GHSA-v4jc-pm6r-3vj8
Products affected by CVE-2026-47103
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cpe:2.3:a:fgmacedo:python_statemachine:3.0.0
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cpe:2.3:a:fgmacedo:python_statemachine:3.1.0
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cpe:2.3:a:fgmacedo:python_statemachine:3.1.1
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cpe:2.3:a:fgmacedo:python_statemachine:3.1.2