Remote Code Execution Vulnerability in Python StateMachine by FG Macedo
CVE-2026-47103

9.3CRITICAL

Key Information:

Vendor

Fgmacedo

Status
Python-statemachine
Vendor
CVE Published:
17 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-47103?

A critical security vulnerability exists in Python StateMachine versions prior to 3.2.0, allowing remote code execution through unsafe evaluation of crafted SCXML documents. Attackers can inject malicious expression strings that, when processed by the SCXMLProcessor, are passed to Python's eval() function without appropriate security measures, leading to potential execution of arbitrary code in the context of the host application.

Affected Version(s)

python-statemachine 3.0.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-47103-python-statemachine-rce
Created by SaiTeja-Erukude

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

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sai Teja Erukude
VulnCheck
.