CVE-2021-22959

At a glance

Severity: Not available
EPSS: EPSS 3.16 % · percentile 88 (2026-10-27)
State: PUBLISHED
Published: 2021-11-15
Updated: 2025-04-30
Assigner: hackerone
NVD status: Modified

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	NVD · nvd@nist.gov (Primary)
CVSS 2.0	MEDIUM 6.4	AV:N/AC:L/Au:N/C:P/I:P/A:N	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-444

European references

ENISA EUVD · EUVD-2021-10084
GCVE · GCVE-0-2021-22959

CERT-FR advisories

CERTFR-2024-AVI-1051 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2022-AVI-928 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2022-AVI-924 — Multiples vulnérabilités dans IBM QRadar · cert.ssi.gouv.fr
CERTFR-2022-AVI-097 — Multiples vulnérabilités dans IBM Spectrum Protect Plus · cert.ssi.gouv.fr
CERTFR-2022-AVI-051 — Multiples vulnérabilités dans Oracle Java SE · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:* < 2.1.4
cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:* ≥ 3.0.0 < 6.0.6
cpe:2.3:a:oracle:graalvm:20.3.4:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm:21.3.0:*:*:*:enterprise:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

Affected products

Product	Versions
NodeJS · Node	affected 4.0 < 4.* ; affected 5.0 < 5.* ; affected 6.0 < 6.* ; affected 7.0 < 7.* ; affected 8.0 < 8.* ; affected 9.0 < 9.*

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD