CVE-2026-42498Apache Tomcat: WebSocket authentication header exposure
Updated under an hour ago ()
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It affects Apache Software Foundation Apache Tomcat and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.3 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- apache
- NVD analysis
- Analyzed
- Record last updated
- May 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apache Software Foundation Apache Tomcat apache_software_foundation:apache_tomcat (from the name) | 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 | CNA record |
apache tomcat 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 | NVD |
References
- https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdbvendor-advisory, mailing-list
- http://www.openwall.com/lists/oss-security/2026/05/12/14mailing-list, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.