Apache Tomcat: WebSocket authentication header exposure

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-42498
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-12 16:16:17 UTC
Updated2026-05-12 18:17:24 UTC
DescriptionExposure 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.

Risk And Classification

Problem Types: CWE-200 | CWE-200 CWE-200 Exposure of HTTP Authentication Header to unexpected hosts

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Tomcat affected 11.0.0-M1 11.0.21 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 10.1.0-M1 10.1.54 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 9.0.2 9.0.117 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 8.5.24 8.5.100 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 7.0.83 7.0.109 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb [email protected] lists.apache.org
www.openwall.com/lists/oss-security/2026/05/12/14 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: lokerxx (en)

© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report