Important: Red Hat Security Advisory: tomcat security update

An update for tomcat is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from th...

tomcat: Apache Tomcat: Certificate revocation bypass due to improper OCSP response validation

A flaw was found in Apache Tomcat. When an Online Certificate Status Protocol OCSP responder is used, the Tomcat Native component, and Tomcat's FFM port of the Tomcat Native code, does not properly verify or check the freshness of the OCSP response. This improper input validation vulnerability...

Important: tomcat security update

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages JSP technologies. Security Fixes: tomcat: Apache Tomcat: Certificate revocation bypass due to improper OCSP response validation CVE-2026-24734 For more details about the security issues, including the impact, a CVSS...

Information Disclosure org.apache.tomcat:tomcat-catalina Dependency in Jira Software Data Center

This High severity Information Disclosure vulnerability was introduced in versions 9.12.1, 9.15.2, 9.16.0, 9.17.0, 10.0.1, 10.1.1, 10.2.0, 10.3.0, 10.4.0, 10.5.0, 10.6.0, 10.7.1, 11.0.0, 11.1.0, 11.2.0, and 11.3.0 of Jira Software Data Center. This Information Disclosure vulnerability, with a CVS...

The vulnerability of the Apache Tomcat application server, related to insufficient input validation, allows attackers to cause service failures.

The vulnerability of the Apache Tomcat application server is related to insufficient validation of input data. Exploiting this vulnerability can allow a malicious actor to cause service failures...

The vulnerability of the Apache Tomcat application server, related to the bypassing of authentication, allows attackers to escalate their privileges.

The vulnerability of the Apache Tomcat application server is related to the bypassing of authentication checks. Exploiting this vulnerability allows a malicious actor to enhance their privileges remotely...

Amazon Linux 2023 : tomcat9, tomcat9-admin-webapps, tomcat9-el-3.0-api (ALAS2023-2026-1770)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1770 advisory. 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...

TencentOS Server 4: tomcat (TSSA-2026:0247)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0247 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities...

Amazon Linux 2 : tomcat, --advisory ALAS2TOMCAT9-2026-026 (ALASTOMCAT9-2026-026)

The version of tomcat installed on the remote host is prior to 9.0.118-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2TOMCAT9-2026-026 advisory. Allocation of Resources Without Limits or Throttling vulnerability in Apache Tomcat. This issue affects Apache...

CVE-2026-43513

In Apache Tomcat, LockOutRealm mishandled case sensitivity in usernames, resulting in less effective blocking of brute force attacks. Mitigation This vulnerability only affects Tomcat deployments using the LockOutRealm with a case-insensitive authentication backend. Deployments not using...

CVE-2026-41284

In Apache Tomcat, no limit was enforced on the request body for WebDAV LOCK or PROPFIND requests which were available to unauthenticated users. This allows a remote attacker to consume excessive resources, leading to Denial of Service DoS, making the affected system unavailable to legitimate user...

CVE-2026-42498

A flaw was found in Apache Tomcat. During WebSocket authentication, the HTTP Authentication Header can be exposed to unexpected hosts. This vulnerability leads to information disclosure, potentially allowing an attacker to gain access to sensitive authentication credentials...

K000161601: Apache Tomcat vulnerability CVE-2026-34486

Security Advisory Description Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor. This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116. Users are recommended to upgrade to version 11.0.21,...

K000161597: Apache Tomcat vulnerability CVE-2026-34483

Security Advisory Description 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 upgrade...

K000161603: Apache Tomcat vulnerability CVE-2026-32990

Security Advisory Description 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 to versio...

K000161600: Apache Tomcat vulnerability CVE-2026-24880

Security Advisory Description 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 through 9.0.115,...

CVE-2026-41293

Apache Tomcat did not validate HTTP/2 request headers, triggering unexpected application behavior, as applications may presume that header values exposed through the Servlet API would be valid...

K000161596: Multiple Apache Tomcat vulnerabilities

Security Advisory Description CVE-2026-25854 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...

Business Logic Vulnerability Apache Tomcat Dependency in Jira Software Data Center

This High severity Business Logic vulnerability was introduced in versions 9.12.1, 9.16.0, 9.17.0, 10.0.1, 10.1.1, 10.2.0, 10.3.0, 10.4.0, 10.5.0, 10.6.0, 10.7.1, 11.0.0, 11.1.0, 11.2.0, and 11.3.0 of Jira Software Data Center. This Business Logic vulnerability, with a CVSS Score of 7.5 and a CVS...

CVE-2026-43515

In Apache Tomcat, when multiple security constraints defined an HTTP method constraint for the same extension pattern, only the first method constraint was applied. A remote attacker could exploit this to bypass intended security restrictions for information or actions within the application...