Allocation of Resources Without Limits or Throttling Affecting twisted package, versions <22.2.0-1


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
3.51% (88th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-TWISTED-20557280
  • published7 Oct 2026
  • disclosed3 Mar 2022

Introduced: 3 Mar 2022

CVE-2022-21716  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Echo:latest twisted to version 22.2.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream twisted package and not the twisted package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer's SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as nc -rv localhost 22 &lt; /dev/zero. A patch is available in version 22.2.0. There are currently no known workarounds.

CVSS Base Scores

version 3.1