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CVE-2026-47103

Fgmacedo Python Statemachine remote code execution

9.8 CRITICALPublic exploitEPSS 1.37%
  1. Published17 Jun 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Fgmacedo Python Statemachine≥ 3.0.0 < 3.2.0

Remediation

Fixed in
Fgmacedo Python Statemachine≥ 3.2.0

References

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Frequently asked

Is CVE-2026-47103 being actively exploited?

CVE-2026-47103 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.37%.

How severe is CVE-2026-47103?

CVE-2026-47103 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.37% probability of exploitation.

Which products are affected by CVE-2026-47103?

Affected products include Fgmacedo Python Statemachine.

How do I fix CVE-2026-47103?

Upgrade affected software to a fixed version, for example Fgmacedo Python Statemachine 3.2.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-47103 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.