Information Exposure Affecting tomcat8 package, versions <8.5.39-1ubuntu1~18.04.3+esm2


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
18.11% (97th percentile)

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  • Snyk IDSNYK-UBUNTU1804-TOMCAT8-1123433
  • published22 Mar 2026
  • disclosed1 Mar 2021

Introduced: 1 Mar 2021

CVE-2021-25122  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade Ubuntu:18.04 tomcat8 to version 8.5.39-1ubuntu1~18.04.3+esm2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat8 package and not the tomcat8 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.

References

CVSS Base Scores

version 3.1