CVE-2021-22960: Debian Linux

Medium severity, CVSS 6.5. EPSS: 2.5% chance of exploitation in the next 30 days.

The parse function in llhttp < 2.1.4 and < 6.0.6. ignores chunk extensions when parsing the body of chunked requests. This leads to HTTP Request Smuggling (HRS) under certain conditions.

Affected products

• Debian Debian Linux: version 11.0 only
• Llhttp Llhttp: before 2.1.4 (fixed in 2.1.4); from 3.0.0, before 6.0.6 (fixed in 6.0.6)
• Oracle Graalvm: version 20.3.4 only; version 21.3.0 only

Published 2021-11-03. Last modified 2026-06-17.