---
title: "CVE-2020-8201\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2020-8201?format=md
keywords: index, follow
---

# CVE-2020-8201

Publication date 18 September 2020

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.4 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2020-8201?format=md#impact-score)

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## Description

Node.js < 12.18.4 and < 14.11 can be exploited to perform HTTP desync
attacks and deliver malicious payloads to unsuspecting users. The payloads
can be crafted by an attacker to hijack user sessions, poison cookies,
perform clickjacking, and a multitude of other attacks depending on the
architecture of the underlying system. The attack was possible due to a bug
in processing of carrier-return symbols in the HTTP header names.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| nodejs | 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Ignored end of life |
| 21.04 hirsute | Ignored end of life |
| 20.10 groovy | Ignored end of life |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.4 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | High |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.4 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8201)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-8201)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-8201)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2020-8201)

### Other references

* <https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/#http-request-smuggling-due-to-cr-to-hyphen-conversion-high-cve-2020-8201>
* <https://hackerone.com/reports/922597>
* <https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/>
* <https://www.cve.org/CVERecord?id=CVE-2020-8201>