UpHeron
All vulnerabilities

Servers and applications

CVE-2026-55955

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,…

Severity
Medium 6.5
Published
29 Jun 2026
Last changed
10 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-2026-55955
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-55955