CVE-2021-22960

MEDIUM

llhttp < 2.1.4 and < 6.0.6 - HTTP Request Smuggling via Chunk Extension Parsing

Title source: llm
STIX 2.1

Description

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.

References (3)

Core 3
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1238099
Patch, Third Party Advisory x_refsource_misc
https://www.oracle.com/security-alerts/cpujan2022.html
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2022/dsa-5170

Scores

CVSS v3 6.5
EPSS 0.0230
EPSS Percentile 81.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Details

CWE
CWE-444
Status published
Products (4)
debian/debian_linux 11.0
llhttp/llhttp < 2.1.4
oracle/graalvm 20.3.4
oracle/graalvm 21.3.0
Published Nov 03, 2021
Tracked Since Feb 18, 2026