RCE in Fgmacedo Python-Statemachine
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.014 (70.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: +0.000
Affected products
- Fgmacedo Python-Statemachine — versions 3.0.0
- Fgmacedo Python Statemachine
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/fgmacedo/python-statemachine/releases/tag/v3.2.0 (release-notes, Release Notes)
- github.com/fgmacedo/python-statemachine/security/advisories/GHSA-v4jc-pm6r-3vj8 (Exploit, vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/python-statemachine-rce-via-scxml-eval-injection (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/SaiTeja-Erukude/CVE-2026-47103-python-statemachine-rce (technical-description, exploit)
Frequently asked questions
- What is CVE-2026-47103?
- CVE-2026-47103 is a critical-severity vulnerability in Fgmacedo Python-Statemachine, classified under Eval Injection. CVSS score: 9.8/10. Published 2026-06-17.
- How severe is CVE-2026-47103?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-47103 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.