CVE-2026-55956

A flaw was found in Apache Tomcat where access control rules for the default servlet are improperly handled. An attacker can exploit this issue to bypass specific HTTP method restrictions, potentially gaining unauthorized access to protected application resources. Mitigation Review your...

Exploit for Reliance on Untrusted Inputs in a Security Decision in Apache Tomcat

Lab Description This lab focuses on CVE-2026-34486, a hig...

Fixed in Apache Tomcat 9.0.120

Low: EncryptInterceptor requirements not clearly documented CVE-2026-59084 The requirements to securely configure the EncryptInterceptor were not clearly documented. This was fixed with commit 617d7275. This issue was reported to the Tomcat security team on 29 June 2026. The issue was made public...

BIT-TOMCAT-2026-55956 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 through 11.0.22, from 10.1.0 through 10.1.55, from 9.0.0...

BIT-TOMCAT-2026-55955 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 through 11.0.22, from 10.1.0 through 10.1.55, from 9.0.13 through 9.0.18, from 8.5.38 through 8.5.100, from...

BIT-TOMCAT-2026-55276 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 through 11.0.22, from 10.1.0 through 10.1.55, from 9.0.0...

BIT-TOMCAT-2026-53434 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 through 11.0.22, from 10.1.0 through 10.1.55, from 9.0.83 through 9.0.118. Users are recommended to upgrade to version 11.0.23,...

BIT-TOMCAT-2026-53404 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 through 11.0.22, from 10.1.0 through 10.1.55, from 9.0.0...

BIT-TOMCAT-2026-50229 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 through 11.0.22, from 10.1.0 through 10.1.55, from 9.0.0 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0...

K000162052: Apache Tomcat vulnerability CVE-2026-43514

Security Advisory Description 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 through...

Linux Distros Unpatched Vulnerability : CVE-2026-55957

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to...

SUSE CVE-2026-55955

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 9.0.18, from 8.5.38 through 8.5.100, fro...

SUSE CVE-2026-55956

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, from 10.1.0-M1 through 10.1.55, from...

CVE-2026-53434

A flaw was found in Apache Tomcat. When configuring Certificate Revocation Lists CRLs for a FFM presumably a specific type of connector, the system fails to detect and act upon an error condition. This oversight could lead to unexpected behavior or a security bypass, as the intended security...

CVE-2026-55955

A flaw was found in Apache Tomcat. An improper authentication vulnerability in the EncryptionInterceptor component allows a remote attacker to perform a replay attack. This could lead to unauthorized access or manipulation of data within the cluster component. Mitigation This vulnerability only...

CVE-2026-50229

A flaw was found in Apache Tomcat. This vulnerability, known as Cross-Site Scripting XSS, allows a remote attacker to inject malicious scripts into the 'number guess example' web page. When other users view the compromised page, these scripts can execute in their web browsers. This could lead to...

Linux Distros Unpatched Vulnerability : CVE-2026-55955

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component. This issue affects...

Linux Distros Unpatched Vulnerability : CVE-2026-55276

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when...

Linux Distros Unpatched Vulnerability : CVE-2026-53404

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent...

Apache Tomcat 9.0.0.M1 < 9.0.102

The version of Tomcat installed on the remote host is prior to 9.0.102. It is, therefore, affected by a vulnerability as referenced in the fixedinapachetomcat9.0.102security-9 advisory. - Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to...