Python StateMachine 3.0.0 < 3.2.0 RCE via SCXML eval() Injection
CVE-2026-47103

9.3CRITICAL

Key Information:

Vendor

Fgmacedo

Status
Python-statemachine
Vendor
CVE Published:
17 June 2026

What is 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 Version(s)

python-statemachine 3.0.0

References

https://github.com/fgmacedo/python-statemachine/releases/...
release-notes
https://github.com/fgmacedo/python-statemachine/security/...
vendor-advisory
https://www.vulncheck.com/advisories/python-statemachine-...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sai Teja Erukude
VulnCheck
.