---
title: "CVE-2018-7159\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-2018-7159?format=md
keywords: index, follow
---

# CVE-2018-7159

Publication date 17 May 2018

Last updated 26 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**5.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2018-7159?format=md#impact-score)

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## Description

The HTTP parser in all current versions of Node.js ignores spaces in the
`Content-Length` header, allowing input such as `Content-Length: 1 2` to be
interpreted as having a value of `12`. The HTTP specification does not
allow for spaces in the `Content-Length` value and the Node.js HTTP parser
has been brought into line on this particular difference. The security risk
of this flaw to Node.js users is considered to be VERY LOW as it is
difficult, and may be impossible, to craft an attack that makes use of this
flaw in a way that could not already be achieved by supplying an incorrect
value for `Content-Length`. Vulnerabilities may exist in user-code that
make incorrect assumptions about the potential accuracy of this value
compared to the actual length of the data supplied. Node.js users crafting
lower-level HTTP utilities are advised to re-check the length of any input
supplied after parsing is complete.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| nodejs | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Not affected |
| 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Vulnerable |
| 17.10 artful | Ignored end of life |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | Vulnerable |

---

* [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**

5.3 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.3 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7159)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-7159)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-7159)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-7159)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2018-7159>