Information Exposure Affecting undertow package, versions <2.2.16-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.9% (75th percentile)

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  • Snyk IDSNYK-DEBIAN14-UNDERTOW-13803847
  • published2 Nov 2025
  • disclosed26 Aug 2022

Introduced: 26 Aug 2022

CVE-2021-3859  (opens in a new tab)
CWE-214  (opens in a new tab)

How to fix?

Upgrade Debian:14 undertow to version 2.2.16-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream undertow package and not the undertow package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

A flaw was found in Undertow that tripped the client-side invocation timeout with certain calls made over HTTP2. This flaw allows an attacker to carry out denial of service attacks.

CVSS Base Scores

version 3.1