UpHeron
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Servers and applications

CVE-2026-42498

Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.

Severity
High 7.3
Published
12 May 2026
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
9.0.118, 10.1.55, 11.0.22
Sources
NVD

Affected software

SoftwareAffected versions
Apache TomcatServers and applications · cpe:a:apache:tomcat
  • From 7.0.0 up to 7.0.109
  • From 8.5.0 up to 8.5.100
  • From 9.0.0 before 9.0.118
  • From 10.1.0 before 10.1.55
  • From 11.0.0 before 11.0.22

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-42498
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-42498