CVE-2021-22959

PoC —

CVSS 3.1

6.5 medium

EPSS

3%p87

Published

Nov 15, 2021 (Nov 15, 2021)

Modified

Jun 17, 2026

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.

Vendors: llhttp oracle debian
Products: llhttp, graalvm, debian linux
Weakness: CWE-444
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (3.2%)

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