CVE-2026-42498— Apache Tomcat: WebSocket authentication header exposure
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I. Basic Information for CVE-2026-42498
Vulnerability Information
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Vulnerability Title
Apache Tomcat: WebSocket authentication header exposure
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache Tomcat 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。用于实现对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat存在信息泄露漏洞，该漏洞源于WebSocket身份验证期间HTTP认证标头暴露给意外主机。以下版本受到影响：11.0.0-M1版本至11.0.21版本、10.1.0-M1版本至10.1.54版本、9.0.2版本至9.0.117版本、8.5.24版本至8.5.100版本和7.0.83版本至7.0.109版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 ~ 11.0.21 | - |
II. Public POCs for CVE-2026-42498
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|---|
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Same Patch Batch · Apache Software Foundation · 2026-05-12 · 7 CVEs total
| CVE-2026-41284 | Apache Tomcat: Unbounded read in WebDAV LOCK and PROPFIND handling | |
| CVE-2026-41293 | Apache Tomcat: HTTP/2 request headers not validated | |
| CVE-2026-43512 | Apache Tomcat: Digest authenticator will authenticate any unknown user | |
| CVE-2026-43513 | Apache Tomcat: LockOutRealm treats user names as case-sensitive | |
| CVE-2026-43514 | Apache Tomcat: AJP secret compared in non-constant time | |
| CVE-2026-43515 | Apache Tomcat: Security constraints not correctly applied |
IV. Related Vulnerabilities
Same product: Apache Tomcat
- CVE-2026-43515
Apache Tomcat: Security constraints not correctly applied - CVE-2026-43514
Apache Tomcat: AJP secret compared in non-constant time - CVE-2026-43513
Apache Tomcat: LockOutRealm treats user names as case-sensit - CVE-2026-43512
Apache Tomcat: Digest authenticator will authenticate any un - CVE-2026-41293
Apache Tomcat: HTTP/2 request headers not validated
Same vendor: Apache Software Foundation
- CVE-2026-35194
Apache Flink: Remote code execution via SQL injection in cod - CVE-2026-45205
Apache Commons Configuration: StackOverflowError for YAML in - CVE-2026-43515
Apache Tomcat: Security constraints not correctly applied - CVE-2026-43514
Apache Tomcat: AJP secret compared in non-constant time - CVE-2026-43513
Apache Tomcat: LockOutRealm treats user names as case-sensit
Same weakness: CWE-200
- CVE-2026-45351
Open WebUI: Exposure of System Prompt to Regular User [Non-A - CVE-2026-45387
Open WebUI: Sharing models for others to use (read permissio - CVE-2026-41960
Calls权限控制漏洞影响可用性 - CVE-2026-41615
Microsoft Authenticator Information Disclosure Vulnerability - CVE-2026-0245
Prisma Access Agent: Information Disclosure Vulnerabilities
V. Comments for CVE-2026-42498
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