CVE-2021-22960

llhttp: HTTP Request Smuggling when parsing the body of chunked requests

Published Nov 3, 2021 CVSS 3.1 · 6.5 Medium EPSS 2.5% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-5170-1 nodejs security update
EUVD EUVD EUVD-2021-10085 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.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
hackerone
Published
Updated
Apr 30, 2025, 10:24 PM
Reserved
Jan 6, 2021, 12:00 AM
Status
Modified
Published
Nov 3, 2021, 8:15 PM
Modified
Jun 17, 2026, 3:38 AM
Severity
Low
Public date
Oct 12, 2021, 12:00 AM