CVE-2020-25574: Hyper HTTP

High severity, CVSS 7.5. EPSS: 2.5% chance of exploitation in the next 30 days.

An issue was discovered in the http crate before 0.1.20 for Rust. An integer overflow in HeaderMap::reserve() could result in denial of service (e.g., an infinite loop).

Affected products

• Hyper HTTP: before 0.1.20 (fixed in 0.1.20)

Published 2020-09-14. Last modified 2026-06-17.