---
title: "CVE-2026-47103: python-statemachine SCXML <data expr> Eval Injection"
url: https://erroneo.us/security/cve/CVE-2026-47103/
description: "CVE-2026-47103 (python-statemachine (PyPI)): Python StateMachine versions 3.0.0 before 3.2.0 contains a remote code execution vulnerability that allows…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-17
date_modified: 2026-10-08
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-47103"
kev: false
cvss: 9.3
epss: 0.0137
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-47103: python-statemachine SCXML <data expr> Eval Injection

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.4% , percentile 72: FIRST’s model estimates a 1.4% chance of exploitation activity in the next 30 days, higher than 72% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes python-statemachine (PyPI) >= 3.0.0, < 3.2.0, fixed in 3.2.0 . Check your lockfile, including transitive dependencies.

## What it is

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 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 packages

- PyPI `python-statemachine` >= 3.0.0, < 3.2.0 → fixed: 3.2.0

## Affected products (CVE record)

- fgmacedo python-statemachine: 3.0.0 < 3.2.0

## Severity

- VulnCheck CVSS 4.0: 9.3 `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`
- VulnCheck CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 4.0: 9.3 `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:X/V:X/RE:X/U:X`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.37% probability of exploitation activity in the next 30 days; percentile 72.

## Sources

- [Release Notes](https://github.com/fgmacedo/python-statemachine/releases/tag/v3.2.0)
- [GitHub Security Advisory (GHSA-v4jc-pm6r-3vj8)](https://github.com/fgmacedo/python-statemachine/security/advisories/GHSA-v4jc-pm6r-3vj8)
- [GitHub Advisory GHSA-v4jc-pm6r-3vj8](https://github.com/advisories/GHSA-v4jc-pm6r-3vj8)
- [CVE.org record CVE-2026-47103](https://www.cve.org/CVERecord?id=CVE-2026-47103)
- [NVD entry CVE-2026-47103](https://nvd.nist.gov/vuln/detail/CVE-2026-47103)
- [Researcher Disclosure](https://github.com/SaiTeja-Erukude/CVE-2026-47103-python-statemachine-rce)
- [vulncheck.com](https://www.vulncheck.com/advisories/python-statemachine-rce-via-scxml-eval-injection)

---
Source page: https://erroneo.us/security/cve/CVE-2026-47103/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt