Node.js up to 12.22.6/14.18.0/16.11.0 llhttp request smuggling
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 7.0 | $0-$5k | 0.00 |
Summary
A vulnerability marked as critical has been reported in Node.js up to 12.22.6/14.18.0/16.11.0. Affected by this issue is some unknown functionality of the component llhttp. This manipulation causes request smuggling. This vulnerability is registered as CVE-2021-22959. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.
Details
A vulnerability has been found in Node.js up to 12.22.6/14.18.0/16.11.0 (JavaScript Library) and classified as critical. Affected by this vulnerability is an unknown code of the component llhttp. The manipulation with an unknown input leads to a request smuggling vulnerability. The CWE definition for the vulnerability is CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. As an impact it is known to affect confidentiality, integrity, and availability.
The weakness was published 10/14/2021. The advisory is shared at nodejs.org. This vulnerability is known as CVE-2021-22959 since 01/06/2021. Neither technical details nor an exploit are publicly available.
The vulnerability scanner Nessus provides a plugin with the ID 236651 (Alibaba Cloud Linux 3 : 0014: nodejs:14 (ALINUX3-SA-2022:0014)), which helps to determine the existence of the flaw in a target environment.
Upgrading to version 12.22.7, 14.18.1 or 16.11.1 eliminates this vulnerability. The upgrade is hosted for download at nodejs.org.
The vulnerability is also documented in the vulnerability database at Tenable (236651). If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Product
Type
Name
Version
- 12.22.0
- 12.22.1
- 12.22.2
- 12.22.3
- 12.22.4
- 12.22.5
- 12.22.6
- 14.0
- 14.1
- 14.2
- 14.3
- 14.4
- 14.5
- 14.6
- 14.7
- 14.8
- 14.9
- 14.10
- 14.11
- 14.12
- 14.13
- 14.14
- 14.15
- 14.16
- 14.17
- 14.18.0
- 16.0
- 16.1
- 16.2
- 16.3
- 16.4
- 16.5
- 16.6
- 16.7
- 16.8
- 16.9
- 16.10
- 16.11.0
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔍VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.3VulDB Meta Temp Score: 7.0
VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Request smugglingCWE: CWE-444
CAPEC: 🔍
ATT&CK: 🔍
Physical: No
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Nessus ID: 236651
Nessus Name: Alibaba Cloud Linux 3 : 0014: nodejs:14 (ALINUX3-SA-2022:0014)
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Node.js 12.22.7/14.18.1/16.11.1
Timeline
01/06/2021 🔍10/14/2021 🔍
10/14/2021 🔍
05/18/2025 🔍
Sources
Advisory: nodejs.orgStatus: Confirmed
CVE: CVE-2021-22959 (🔍)
GCVE (CVE): GCVE-0-2021-22959
GCVE (VulDB): GCVE-100-184405
Entry
Created: 10/14/2021 11:52Updated: 05/18/2025 20:54
Changes: 10/14/2021 11:52 (40), 05/18/2025 20:54 (16)
Complete: 🔍
Submitter: CSieberg
Cache ID: 216::103
Submit
Accepted
- Submit #22306: CVE-2021-22959, CVE-2021-22960 in Node.JS (by CSieberg)
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
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