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.
| Vendor | Product | Versions |
|---|---|---|
| apache | tomcat | maven/org.apache.tomcat.embed:tomcat-embed-core: < 9.0.118, maven/org.apache.tomcat.embed:tomcat-embed-core: >= 10.1.0-M1, < 10.1.55, maven/org.apache.tomcat.embed:tomcat-embed-core: >= 11.0.0-M1, < 11.0.22, maven/org.apache.tomcat:tomcat: < 9.0.118, maven/org.apache.tomcat:tomcat: >= 10.1.0-M1, < 10.1.55, maven/org.apache.tomcat:tomcat: >= 11.0.0-M1, < 11.0.22, maven/org.apache.tomcat:tomcat-catalina: < 9.0.118, maven/org.apache.tomcat:tomcat-catalina: >= 10.1.0-M1, < 10.1.55, maven/org.apache.tomcat:tomcat-catalina: >= 11.0.0-M1, < 11.0.22 |
Downstream vendors/products affected by this vulnerability
| Vendor | Product | Source | Confidence |
|---|---|---|---|
| atlassian | crucible | cert_advisory | 90% |
| atlassian | fisheye | cert_advisory | 90% |
| atlassian | bitbucket | cert_advisory | 90% |
| atlassian | jira | cert_advisory | 90% |
| atlassian | confluence | cert_advisory | 90% |
Updated severity to MEDIUM, marked as actively exploited, and added CVE ID CVE-2026-42498.
Updated severity from NONE to LOW and set patchAvailable to null.
Initial creation
