CVE-2021-22959

MEDIUM

llhttp < 2.1.4 - HTTP Request Smuggling via Header Name Parsing

Title source: llm

Description

The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp < v2.1.4 and < v6.0.6.

References (3)

Core 3

Core References

Exploit, Issue Tracking, Third Party Advisory x_refsource_misc

https://hackerone.com/reports/1238709

Patch, Third Party Advisory x_refsource_misc

https://www.oracle.com/security-alerts/cpujan2022.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2022/dsa-5170

Scores

CVSS v3 6.5

EPSS 0.0294

EPSS Percentile 85.3%

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 15, 2021

Tracked Since Feb 18, 2026