What’s Vulnerable › Vulnerabilities

CVE-2020-35917

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-31 · updated 2026-06-17
• Weakness: CWE-416

Description

An issue was discovered in the pyo3 crate before 0.12.4 for Rust. There is a reference-counting error and use-after-free in From<Py<T>>.

Affected products

• Pyo3 Project Pyo3: before 0.12.4 — fixed in 0.12.4

How to fix

Upgrade to a fixed version: Pyo3 Project Pyo3 0.12.4. Check the vendor advisory for mitigations.

References

• https://rustsec.org/advisories/RUSTSEC-2020-0074.html
• https://rustsec.org/advisories/RUSTSEC-2020-0074.html

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