Summary
Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.
Security Fix(es):
* tomcat: Apache Tomcat: Certificate revocation bypass due to improper OCSP response validation (CVE-2026-24734)
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 · 9 | tomcat | 1:9.0.117-1.el9_8 |
| AlmaLinux · 9 | tomcat-admin-webapps | 1:9.0.117-1.el9_8 |
| AlmaLinux · 9 | tomcat-docs-webapp | 1:9.0.117-1.el9_8 |
| AlmaLinux · 9 | tomcat-el-3.0-api | 1:9.0.117-1.el9_8 |
| AlmaLinux · 9 | tomcat-jsp-2.3-api | 1:9.0.117-1.el9_8 |
| AlmaLinux · 9 | tomcat-lib | 1:9.0.117-1.el9_8 |
| AlmaLinux · 9 | tomcat-servlet-4.0-api | 1:9.0.117-1.el9_8 |
| AlmaLinux · 9 | tomcat-webapps | 1:9.0.117-1.el9_8 |
Vulnerabilities 9
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Critical 9.1CVE-2026-29145 Public exploit
Apache Tomcat, Apache Tomcat Native: OCSP checks sometimes soft-fail even when soft-fail is disabled
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat, Apache Tomcat Native. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M7 through 10.1.52, from 9.0…
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High 7.6
Apache Tomcat: Client certificate verification bypass due to virtual host mapping
Improper Input Validation vulnerability. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0-M1 through 9.0.112. The following versions were EOL at the time the CVE was created but are known to be affec…
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High 7.5CVE-2026-24880 Public exploit
Apache Tomcat: Request smuggling via invalid chunk extension
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 throug…
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High 7.5
Apache Tomcat: Incomplete escaping of JSON access logs
Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116. Users are recommended to…
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High 7.5
Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer token
Insertion of Sensitive Information into Log File vulnerability in the cloud membership for clustering component of Apache Tomcat exposed the Kubernetes bearer token. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1…
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High 7.4
Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass
Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat. When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could al…
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Medium 6.5CVE-2026-24733 Public exploit
Apache Tomcat: Security constraint bypass with HTTP/0.9
Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET req…
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Medium 6.5
Apache Tomcat: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. …
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Medium 6.1CVE-2026-25854 Public exploit
Apache Tomcat: Occasionally open redirect
Occasional URL redirection to untrusted Site ('Open Redirect') vulnerability in Apache Tomcat via the LoadBalancerDrainingValve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, …
References
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report
https://access.redhat.com/security/cve/CVE-2026-24734
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report
https://bugzilla.redhat.com/2440426
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advisory
https://errata.almalinux.org/9/ALSA-2026-26323.html
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report
https://www.redhat.com/security/data/cve/CVE-2025-66614.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-24733.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-24880.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-25854.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-29145.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-34483.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-34487.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-34500.html