CVE-2026-55276: Apache Tomcat: Logged effective web.xml is incomplete

Published Jun 29, 2026
·
Updated

Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged.

Affected Software

10 affected componentsFixes available
Apache Tomcat>=11.0.0-M1<=11.0.22
Apache Tomcat>=10.1.0-M1<=10.1.55
Apache Tomcat>=9.0.0.M1<=9.0.118
Apache Tomcat>=8.5.0<=8.5.100
Apache Tomcat<9.0.119
Apache Tomcat>=10.1.0<10.1.56
Apache Tomcat>=11.0.0<11.0.23
debian/tomcat10<=10.1.55-1~deb12u1, <=10.1.55-1~deb13u1, <=10.1.55-1
debian/tomcat11<=11.0.22-1~deb13u1, <=11.0.22-2
debian/tomcat9<=9.0.43-2~deb11u10
9.0.118-0+deb11u19.0.70-29.0.95-19.0.118-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/tomcat9 to a version that resolves this vulnerability.

    Fixed in 9.0.118-0+deb11u1Fixed in 9.0.70-2Fixed in 9.0.95-1Fixed in 9.0.118-1
  2. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 11.0.23
  3. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 10.1.56
  4. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 9.0.119

Event History

Jun 29, 2026
CVE Published
via MITRE·08:42 PM
Data Sourced
via MITRE·08:42 PM
DescriptionWeakness
Data Sourced
via Red Hat·09:02 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·09:16 PM
DescriptionSeverityWeaknessAffected Software
Jul 15, 2026
Data Sourced
via Debian·04:41 PM
DescriptionAffected Software
Jul 17, 2026
Data Sourced
via Ubuntu·04:41 PM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Launchpad·04:43 PM
Description
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Frequently Asked Questions

1

What is the severity of CVE-2026-55276?

CVE-2026-55276 has a risk rating of 30, indicating a significant impact on security.

2

How do I fix CVE-2026-55276?

To fix CVE-2026-55276, upgrade your Apache Tomcat to version 11.0.23, 10.1.56, or 9.0.80 or later.

3

Which Apache Tomcat versions are affected by CVE-2026-55276?

CVE-2026-55276 affects Apache Tomcat versions from 11.0.0-M1 through 11.0.22, 10.1.0-M1 through 10.1.55, and earlier versions in the 9.0 series.

4

What specific issue does CVE-2026-55276 address?

CVE-2026-55276 addresses an Always-Incorrect Control Flow Implementation vulnerability that results in incomplete logging of authorization constraints.

5

How does CVE-2026-55276 impact application security?

CVE-2026-55276 can lead to insufficient authorization visibility, which may expose applications to unauthorized access due to incomplete logging.

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