Improper Authentication Affecting tomcat9-servlet-4.0-api package, versions <1:9.0.120-1.el10_2.alma.1


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.44% (37th percentile)

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  • Snyk IDSNYK-ALMALINUX10-TOMCAT9SERVLET40API-20250595
  • published29 Sept 2026
  • disclosed17 Sept 2026

Introduced: 17 Sep 2026

NewCVE-2026-55955  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:10 tomcat9-servlet-4.0-api to version 1:9.0.120-1.el10_2.alma.1 or higher.
This issue was patched in ALSA-2026:68651.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat9-servlet-4.0-api package and not the tomcat9-servlet-4.0-api package as distributed by AlmaLinux. See How to fix? for AlmaLinux:10 relevant fixed versions and status.

Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.13 through 9.0.18, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109.

Users are recommended to upgrade to version 11.0.23, 10.1.56, 9.0.119, which fixes the issue.

CVSS Base Scores

version 3.1