Summary
Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.
Security Fix(es):
* 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-coyote: tomcat: Improper Authorization allows security bypass (CVE-2026-43515)
* tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm (CVE-2026-43513)
* tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration (CVE-2026-55957)
* tomcat: Apache Tomcat: Security constraint bypass via improper URL encoding in rewrite valve (CVE-2026-59083)
* tomcat: Apache Tomcat: Insufficient documentation for EncryptInterceptor may lead to insecure configurations (CVE-2026-59084)
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 · 8 | tomcat | 1:9.0.120-1.el8_10 |
| AlmaLinux · 8 | tomcat-admin-webapps | 1:9.0.120-1.el8_10 |
| AlmaLinux · 8 | tomcat-docs-webapp | 1:9.0.120-1.el8_10 |
| AlmaLinux · 8 | tomcat-el-3.0-api | 1:9.0.120-1.el8_10 |
| AlmaLinux · 8 | tomcat-jsp-2.3-api | 1:9.0.120-1.el8_10 |
| AlmaLinux · 8 | tomcat-lib | 1:9.0.120-1.el8_10 |
| AlmaLinux · 8 | tomcat-servlet-4.0-api | 1:9.0.120-1.el8_10 |
| AlmaLinux · 8 | tomcat-webapps | 1:9.0.120-1.el8_10 |
Vulnerabilities 29
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Critical 9.8CVE-2024-52316 Public exploit
Apache Tomcat: Authentication bypass when using Jakarta Authentication API
Unchecked Error Condition vulnerability in Apache Tomcat. If Tomcat is configured to use a custom Jakarta Authentication (formerly JASPIC) ServerAuthContext component which may throw an exception during the authentication process without explicitly setting an…
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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 9.6CVE-2025-55754 EPSS 10%
Apache Tomcat: console manipulation via escape sequences in log messages
Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat. Tomcat did not escape ANSI escape sequences in log messages. If Tomcat was running in a console on a Windows operating system, and the console supported ANSI escape …
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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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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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Critical 9.1
Apache Tomcat: Invalid CRL configuration doesn't trigger failure for FFM Connector
Detection of Error Condition Without Action vulnerability in Apache Tomcat when configuring CRLs for a FFM based connector. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M7 through 10.1.55, from 9.0.83 through 9.0.118. Users ar…
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Critical 9.1
Apache Tomcat: Logged effective web.xml is incomplete
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22,…
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Critical 9.1
Apache Tomcat: Incorrect URL decoding in RewriteValve may allow security control bypass
Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from …
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Critical 9.1
Apache Tomcat: EncryptInterceptor requirements not clearly documented
Insufficient Technical Documentation vulnerability in Apache Tomcat since the requirements to securely configure the EncryptInterceptor were not clearly documented. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.…
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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 7.5
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 7.3CVE-2025-46701 Public exploit
Apache Tomcat: Security constraint bypass for CGI scripts
Improper Handling of Case Sensitivity vulnerability in Apache Tomcat's GCI servlet allows security constraint bypass of security constraints that apply to the pathInfo component of a URI mapped to the CGI servlet. This issue affects Apache Tomcat: from 11.0.0…
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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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High 7.3
Apache Tomcat: Bad ornext processing in RewriteValve
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent non-OR conditions were skipped. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, …
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High 7.3CVE-2026-55957 Public exploit
Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind
Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password. This issue affects Apache Tomcat: from 11.0.0-…
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Medium 6.5CVE-2025-55668 Public exploit
Apache Tomcat: session fixation via rewrite valve
Session Fixation vulnerability in Apache Tomcat via rewrite valve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.7, from 10.1.0-M1 through 10.1.41, from 9.0.0.M1 through 9.0.105. Older, EOL versions may also be affected. Users are recommended …
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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: EncryptInterceptor not protected against replay attacks
Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.13 through 9.…
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Medium 6.5
Apache Tomcat: Security constraints for default servlet ignored method
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22…
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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, …
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Medium 6.1
Apache Tomcat: XSS in number guess example
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example for Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through …
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Medium 5.3
Apache Tomcat: DoS in examples web application
Uncontrolled Resource Consumption vulnerability in the examples web application provided with Apache Tomcat leads to denial of service. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.1, from 10.1.0-M1 through 10.1.33, from 9.0.0.M1 through 9.9.…
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Medium 5.3
Apache Tomcat: Delayed cleaning of multi-part upload temporary files may lead to DoS
Improper Resource Shutdown or Release vulnerability in Apache Tomcat. If an error occurred (including exceeding limits) during the processing of a multipart upload, temporary copies of the uploaded parts written to disc were not cleaned up immediately but lef…
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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-2026-41293
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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://access.redhat.com/security/cve/CVE-2026-55957
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report
https://access.redhat.com/security/cve/CVE-2026-59083
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report
https://access.redhat.com/security/cve/CVE-2026-59084
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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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report
https://bugzilla.redhat.com/2476520
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report
https://bugzilla.redhat.com/2494669
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report
https://bugzilla.redhat.com/2499917
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report
https://bugzilla.redhat.com/2499931
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advisory
https://errata.almalinux.org/8/ALSA-2026-68677.html
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report
https://www.redhat.com/security/data/cve/CVE-2024-52316.html
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report
https://www.redhat.com/security/data/cve/CVE-2024-54677.html
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report
https://www.redhat.com/security/data/cve/CVE-2025-46701.html
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report
https://www.redhat.com/security/data/cve/CVE-2025-55668.html
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report
https://www.redhat.com/security/data/cve/CVE-2025-55754.html
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report
https://www.redhat.com/security/data/cve/CVE-2025-61795.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-2026-41284.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-43514.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-50229.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-53404.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-53434.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-55276.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-55955.html
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report
https://www.redhat.com/security/data/cve/CVE-2026-55956.html