Race Condition Affecting pyo3 package, versions >=0.15.0 <0.29.0
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Test your applications- Snyk IDSNYK-RUST-PYO3-17394029
- published22 Jun 2026
- disclosed11 Jun 2026
- creditUnknown
Introduced: 11 Jun 2026
New CVE NOT AVAILABLE CWE-362 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade pyo3 to version 0.29.0 or higher.
Overview
pyo3 is a package that provides Rust bindings for Python. This includes running and interacting with Python code from a Rust binary, as well as writing native Python modules.
Affected versions of this package are vulnerable to Race Condition through the new_closure and new_closure_bound functions. An attacker can trigger data races or cause undefined behavior by invoking Python callables from multiple threads concurrently, as the closures lack the necessary thread-safety guarantees.