UpHeron
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Servers and applications

CVE-2026-55957

Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.…

Severity
High 7.3
Published
29 Jun 2026
Last changed
2 Jul 2026
Added to UpHeron
21 Oct 2026
Fixed in
9.0.101, 10.1.37, 11.0.5
Sources
NVD

Affected software

SoftwareAffected versions
Apache TomcatServers and applications · cpe:a:apache:tomcat
  • Every version before 9.0.101
  • From 10.1.0 before 10.1.37
  • From 11.0.0 before 11.0.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-55957
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-55957