high7.3
CVE-2026-42498
Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.apache.tomcat.embed:tomcat-embed-core | < 9.0.118 | 9.0.118 |
| maven | org.apache.tomcat:tomcat | < 9.0.118 | 9.0.118 |
| maven | org.apache.tomcat:tomcat-catalina | < 9.0.118 | 9.0.118 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Apache | Tomcat | from 7.0.0 through 7.0.109 from 8.5.0 through 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 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-fv25-8xcx-gqjc
- https://nvd.nist.gov/vuln/detail/CVE-2026-42498
- https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb
- http://www.openwall.com/lists/oss-security/2026/05/12/14
- https://github.com/apache/tomcat/commit/169d725788ea6aec217ecac70fe4161c837ba423
- https://github.com/apache/tomcat/commit/6cbe274592ef2d11607b5b188e1df649de52f8d5
- https://github.com/apache/tomcat/commit/b7b173694d588ddcfa432f079baf763cbbbaa5c4
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-11.html
- https://tomcat.apache.org/security-9.html