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.
Published: 2026-05-12
Score: 7.3 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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History

Thu, 14 May 2026 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Apache tomcat
CPEs cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
Vendors & Products Apache tomcat

Wed, 13 May 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 12 May 2026 18:30:00 +0000

Type Values Removed Values Added
References

Tue, 12 May 2026 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache apache Tomcat
Vendors & Products Apache
Apache apache Tomcat

Tue, 12 May 2026 16:00:00 +0000

Type Values Removed Values 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.
Title Apache Tomcat: WebSocket authentication header exposure
Weaknesses CWE-200
References

Subscriptions

Apache Apache Tomcat Tomcat
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-05-13T15:59:04.361Z

Reserved: 2026-04-27T22:13:05.647Z

Link: CVE-2026-42498

cve-icon Vulnrichment

Updated: 2026-05-12T17:40:58.470Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-12T16:16:17.800

Modified: 2026-05-14T18:51:59.217

Link: CVE-2026-42498

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T18:15:16Z

Weaknesses