Authentication Bypass by Primary Weakness Affecting tomcat-webapps package, versions <0:7.0.76-10.amzn2.0.17


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
2.86% (86th 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-AMZN2-TOMCATWEBAPPS-18904718
  • published18 Aug 2026
  • disclosed29 Jun 2026

Introduced: 29 Jun 2026

CVE-2026-55957  (opens in a new tab)
CWE-305  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 tomcat-webapps to version 0:7.0.76-10.amzn2.0.17 or higher.
This issue was patched in ALAS2-2026-3864.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat-webapps package and not the tomcat-webapps package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.

Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.

CVSS Base Scores

version 3.1