CVE-2026-47103Public exploitNetwork attack vector

Code execution via unsandboxed SCXML expression evaluation

Published Jun 17, 2026 · Updated Jun 17, 2026

Eval injection in Python StateMachine 3.0.0 through 3.1.2 allows attackers to execute code through malicious SCXML data expressions. The SCXMLProcessor data-model path passes each data element's expr string through _eval(), which invokes Python eval() without sandboxing or restriction. Exploitation requires a consuming application to process attacker-controlled SCXML; successful payloads run with the hosting process's privileges.

CVSS severity9.3
Critical
EPSS probability1.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Eval injection in Python StateMachine 3.0.0 through 3.1.2 allows attackers to execute code through malicious SCXML data expressions. The SCXMLProcessor data-model path passes each data element's expr string through _eval(), which invokes Python eval() without sandboxing or restriction. Exploitation requires a consuming application to process attacker-controlled SCXML; successful payloads run with the hosting process's privileges.

The record

CVE
CVE-2026-47103
Published
Jun 17, 2026
Updated
Jun 17, 2026
Vendor
Fernando Macedo
Product
Python StateMachine
Classifications
CWE-94, CWE-95, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0.0 <3.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fernando Macedo · Python StateMachineversion=3.0.0 <3.2.0

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
T1059.006Command and Scripting Interpreter: Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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