CVE-2022-31394: Hyper

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

Hyperium Hyper before 0.14.19 does not allow for customization of the max_header_list_size method in the H2 third-party software, allowing attackers to perform HTTP2 attacks.

Affected products

• Hyper Hyper: before 0.14.19 (fixed in 0.14.19)

Published 2023-02-21. Last modified 2026-06-17.