Summary
Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.
Security Fix(es):
* Apache Tomcat: Apache Tomcat: Improper Input Validation vulnerability due to incomplete fix (CVE-2026-32990)
* tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication (CVE-2026-43512)
* tomcat-coyote: Apache Tomcat: HTTP/2 request headers not validated (CVE-2026-41293)
* tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during WebSocket authentication (CVE-2026-42498)
* tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm (CVE-2026-43513)
* tomcat-coyote: tomcat: Improper Authorization allows security bypass (CVE-2026-43515)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 8
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 10 | tomcat | 1:10.1.49-4.el10_2.alma.1 |
| AlmaLinux · 10 | tomcat-admin-webapps | 1:10.1.49-4.el10_2.alma.1 |
| AlmaLinux · 10 | tomcat-docs-webapp | 1:10.1.49-4.el10_2.alma.1 |
| AlmaLinux · 10 | tomcat-el-5.0-api | 1:10.1.49-4.el10_2.alma.1 |
| AlmaLinux · 10 | tomcat-jsp-3.1-api | 1:10.1.49-4.el10_2.alma.1 |
| AlmaLinux · 10 | tomcat-lib | 1:10.1.49-4.el10_2.alma.1 |
| AlmaLinux · 10 | tomcat-servlet-6.0-api | 1:10.1.49-4.el10_2.alma.1 |
| AlmaLinux · 10 | tomcat-webapps | 1:10.1.49-4.el10_2.alma.1 |
Vulnerabilities 8
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Critical 9.8CVE-2026-41293 Public exploit
Apache Tomcat: HTTP/2 request headers not validated
Improper Input Validation 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 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27. Older, end of support versions may also …
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Critical 9.8CVE-2026-43512 Public exploit
Apache Tomcat: Digest authenticator will authenticate any unknown user
DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication 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 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from…
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Critical 9.1CVE-2026-43515 Public exploit
Apache Tomcat: Security constraints not correctly applied
Improper Authorization vulnerability when multiple method constraints define an HTTP method for the same extension 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 9.0.0.M1 through 9.0.11…
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High 7.5
Apache Tomcat: Unbounded read in WebDAV LOCK and PROPFIND handling
Allocation of Resources Without Limits or Throttling 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 9.0.0.M1 through 9.0.117. Older, unsupported versions may also be affec…
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High 7.5
Apache Tomcat: LockOutRealm treats user names as case-sensitive
Improper Handling of Case Sensitivity vulnerability in LockOutRealm 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 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 throu…
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High 7.3
Apache Tomcat: WebSocket authentication header exposure
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 8.5.2…
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Medium 5.3
Apache Tomcat: Fix for CVE-2025-66614 is incomplete
Improper Input Validation vulnerability in Apache Tomcat due to an incomplete fix of CVE-2025-66614. This issue affects Apache Tomcat: from 11.0.15 through 11.0.19, from 10.1.50 through 10.1.52, from 9.0.113 through 9.0.115. Users are recommended to upgrade t…
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Low 3.7
Apache Tomcat: AJP secret compared in non-constant time
Observable Timing Discrepancy vulnerability when comparing AJP secret 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 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 thr…
References
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report
https://access.redhat.com/security/cve/CVE-2026-32990
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report
https://access.redhat.com/security/cve/CVE-2026-41293
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report
https://access.redhat.com/security/cve/CVE-2026-42498
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report
https://access.redhat.com/security/cve/CVE-2026-43512
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report
https://access.redhat.com/security/cve/CVE-2026-43513
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report
https://access.redhat.com/security/cve/CVE-2026-43515
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report
https://bugzilla.redhat.com/2457025
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report
https://bugzilla.redhat.com/2476511
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report
https://bugzilla.redhat.com/2476513
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report
https://bugzilla.redhat.com/2476516
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report
https://bugzilla.redhat.com/2476519
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advisory
https://errata.almalinux.org/10/ALSA-2026-69259.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-41284.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-43514.html