What is CVE-2020-36454?

CVE-2020-36454 is a high-severity vulnerability in Parc Project, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.1/10. Published 2021-08-08.

How severe is CVE-2020-36454?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Parc Project

CVE-2020-36454

An issue was discovered in the parc crate through 2020-11-14 for Rust. LockWeak<T> has an unconditional implementation of Send without trait bounds on T.

Vulnerability class: Race Condition

Published 2021-08-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Parc Project

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

rustsec.org/advisories/RUSTSEC-2020-0134.html (Exploit, Patch, Third Party Advisory, Issue Tracking)
raw.githubusercontent.com/rustsec/advisory-db/main/crates/parc/RUSTSEC-2020-013… (Third Party Advisory)

Frequently asked questions

What is CVE-2020-36454?: CVE-2020-36454 is a high-severity vulnerability in Parc Project, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.1/10. Published 2021-08-08.
How severe is CVE-2020-36454?: High severity. CVSS v3 base score is 8.1 out of 10.