CVE-2021-22959

MediumCVSS 6.5/10Last 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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-444

Affected software

Vendor	Product	Versions
NodeJS	Node	>= 4.0, < 4.; >= 5.0, < 5.; >= 6.0, < 6.; >= 7.0, < 7.; >= 8.0, < 8.; >= 9.0, < 9.; >= 10.0, < 10.; >= 11.0, < 11.; >= 12.0, < 12.22.7; >= 13.0, < 13.; >= 14.0, < 14.18.1; >= 15.0, < 15.; >= 16.0, < 16.11.1

References

https://hackerone.com/reports/1238709Exploit, Issue Tracking, Third Party Advisory
https://www.debian.org/security/2022/dsa-5170Mailing List, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
https://hackerone.com/reports/1238709Exploit, Issue Tracking, Third Party Advisory
https://www.debian.org/security/2022/dsa-5170Mailing List, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory

Timeline

Published: Nov 15, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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