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Vulnerability record · CVE-2026-47103 · published 17 June 2026

CVE-2026-47103: Fgmacedo python statemachine code injection vulnerability

FFgmacedo · Python Statemachine

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.

9.3 CVSS 4.0 Critical EPSS 1.4% · top 29.2% CWE-95 · CWE-95CWE-94 · Code injection
9.3CVSS 4.0 base score
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 2 tagged exploit
28 Aug 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/SaiTeja-Erukude/CVE-2026-47103-python-statemachine-rce
https://github.com/fgmacedo/python-statemachine/releases/tag/v3.2.0 Release Notes
https://github.com/fgmacedo/python-statemachine/security/advisories/GHSA-v4jc-pm6r-3vj8 ExploitVendor Advisory
https://www.vulncheck.com/advisories/python-statemachine-rce-via-scxml-eval-injection Third Party AdvisoryVDB Entry
https://github.com/fgmacedo/python-statemachine/security/advisories/GHSA-v4jc-pm6r-3vj8 ExploitVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-47103), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.