Apache Tomcat Control Flow Issue Affecting Multiple Versions
CVE-2026-55276

9.1CRITICAL

Key Information:

Vendor

Apache
Status
Apache Tomcat
Vendor
CVE Published:
29 June 2026

What is CVE-2026-55276?

A vulnerability in Apache Tomcat allows for improper control flow implementations that result in special roles and empty authorization constraints being excluded from logs generated from the effective web.xml file. This oversight could potentially lead to security risks, as essential authorization information may not be accurately captured or monitored. Users are encouraged to apply the security updates by upgrading to versions 11.0.23, 10.1.56, or 9.0.119 to mitigate this issue.

Affected Version(s)

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

References

https://lists.apache.org/thread/jy09xjlzn6r2qwvqoph8vcmf9...
vendor-advisory

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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