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Servers and applications

CVE-2026-55956

Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions…

Severity
Medium 6.5
Published
29 Jun 2026
Last changed
2 Jul 2026
Added to UpHeron
21 Oct 2026
Fixed in
9.0.119, 10.1.56, 11.0.23
Sources
NVD

Affected software

SoftwareAffected versions
Apache TomcatServers and applications · cpe:a:apache:tomcat
  • Every version before 9.0.119
  • From 10.1.0 before 10.1.56
  • From 11.0.0 before 11.0.23

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-55956
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-55956