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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42498

⇱ NVD - CVE-2026-42498

  1. Vulnerabilities

CVE-2026-42498 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2026/05/12/14 CVE Mailing List  Third Party Advisory 
https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb Apache Software Foundation Mailing List  Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Apache Software Foundation  

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

6 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 6:47:56 AM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2026-05-13T15:58:45.406125Z","id":"CVE-2026-42498","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by Apache Software Foundation 6/17/2026 6:47:56 AM

Action Type Old Value New Value
Added Affected 
[{"vendor":"Apache Software Foundation","product":"Apache Tomcat","defaultStatus":"unaffected","versions":[{"version":"11.0.0-M1","lessThanOrEqual":"11.0.21","versionType":"semver","status":"affected"},{"version":"10.1.0-M1","lessThanOrEqual":"10.1.54","versionType":"semver","status":"affected"},{"version":"9.0.2","lessThanOrEqual":"9.0.117","versionType":"semver","status":"affected"},{"version":"8.5.24","lessThanOrEqual":"8.5.100","versionType":"semver","status":"affected"},{"version":"7.0.83","lessThanOrEqual":"7.0.109","versionType":"semver","status":"affected"}]}]

Initial Analysis by NIST 5/14/2026 2:51:59 PM

Action Type Old Value New Value
Added CPE Configuration 
OR
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 8.5.0 up to (including) 8.5.100
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.55
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.0.118
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 11.0.0 up to (excluding) 11.0.22
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (including) 7.0.109
Added Reference Type 
Apache Software Foundation: https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb Types: Mailing List, Vendor Advisory
Added Reference Type 
CVE: http://www.openwall.com/lists/oss-security/2026/05/12/14 Types: Mailing List, Third Party Advisory

CVE Modified by CISA-ADP 5/13/2026 12:16:48 PM

Action Type Old Value New Value
Added CVSS V3.1 
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVE Modified by CVE 5/12/2026 2:17:24 PM

Action Type Old Value New Value
Added Reference 
http://www.openwall.com/lists/oss-security/2026/05/12/14

New CVE Received from Apache Software Foundation 5/12/2026 12:16:17 PM

Action Type Old Value New Value
Added 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.
Added CWE 
CWE-200
Added Reference 
https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb

Quick Info

CVE Dictionary Entry:
CVE-2026-42498
NVD Published Date:
05/12/2026
NVD Last Modified:
06/17/2026
Source:
Apache Software Foundation