CVE-2026-47103
High
High exploit probability or critical severity with a known exploit.
CVSS base
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
1.4%
70.5th percentile
CISA KEV
Not listed
Weakness / dates
CWE-94
Published 2026-06-17 · modified 2026-08-28
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.
Affected
References
- https://github.com/SaiTeja-Erukude/CVE-2026-47103-python-statemachine-rce
- https://github.com/fgmacedo/python-statemachine/releases/tag/v3.2.0
- exploit https://github.com/fgmacedo/python-statemachine/security/advisories/GHSA-v4jc-pm6r-3vj8
- https://www.vulncheck.com/advisories/python-statemachine-rce-via-scxml-eval-injection
- exploit https://github.com/fgmacedo/python-statemachine/security/advisories/GHSA-v4jc-pm6r-3vj8