---
title: "CVE-2021-22883: Uncontrolled Resource Consumption | CubePath"
description: "Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to a denial of service attack when too many connection attempts…"
language: en
source: https://cubepath.com/security/cve/CVE-2021-22883
---

# CVE-2021-22883: Uncontrolled Resource Consumption | CubePath

## Description

Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to a denial of service attack when too many connection attempts with an 'unknownProtocol' are established. This leads to a leak of file descriptors. If a file descriptor limit is configured on the system, then the server is unable to accept new connections and prevent the process also from opening, e.g. a file. If no file descriptor limit is configured, then this lead to an excessive memory usage and cause the system to run out of memory.

Official description from the CVE record, published by hackerone. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-22883)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.77385 (77.4% probability)

Percentile

99.6%

Scores of

Nov 10, 2026

Model

v2026.06.15

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-400](https://cwe.mitre.org/data/definitions/400.html) Uncontrolled Resource Consumption

## Affected products

Products listed in the CVE record, as the CNA published them.

- NodeJS Node

  - affected: 4.0 up to before 4.\*
  - affected: 5.0 up to before 5.\*
  - affected: 6.0 up to before 6.\*
  - affected: 7.0 up to before 7.\*
  - affected: 8.0 up to before 8.\*
  - affected: 9.0 up to before 9.\*
  - affected: 10.0 up to before 10.24.0
  - affected: 11.0 up to before 11.\*
  - affected: 12.0 up to before 12.21.0
  - affected: 13.0 up to before 13.\*
  - affected: 14.0 up to before 14.16.0
  - affected: 15.0 up to before 15.10.0

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [nodejs.org/en/blog/vulnerability/february-2021-security-rel…](https://nodejs.org/en/blog/vulnerability/february-2021-security-releases/)
- [hackerone.com/reports/1043360](https://hackerone.com/reports/1043360)
- [FEDORA-2021-a760169c3c](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E4FRS5ZVK4ZQ7XIJQNGIKUXG2DJFHLO7/)  (lists.fedoraproject.org) vendor-advisory
- [FEDORA-2021-f6bd75e9d4](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F45Y7TXSU33MTKB6AGL2Q5V5ZOCNPKOG/)  (lists.fedoraproject.org) vendor-advisory
- [FEDORA-2021-6aaba80ba2](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSYFUGKFUSZ27M5TEZ3FKILWTWFJTFAZ/)  (lists.fedoraproject.org) vendor-advisory
- [oracle.com/security-alerts/cpuApr2021.html](https://www.oracle.com/security-alerts/cpuApr2021.html)
- [security.netapp.com/advisory/ntap-20210416-0001](https://security.netapp.com/advisory/ntap-20210416-0001/)
- [oracle.com//security-alerts/cpujul2021.html](https://www.oracle.com//security-alerts/cpujul2021.html)
- [oracle.com/security-alerts/cpuoct2021.html](https://www.oracle.com/security-alerts/cpuoct2021.html)
- [cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf)

## Timeline

1. ID reserved Jan 6, 2021
2. Record published Mar 3, 2021
3. Record last updated Apr 30, 2025

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:02 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)