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...

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Apache Tomcat Connectors vulnerability (USN-8369-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-8369-1 advisory. It was discovered that Apache Tomcat Connectors used incorrect default permissions for shared memory on Unix-like...

RockyLinux 10 : tomcat (RLSA-2026:18537)

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:18537 advisory. tomcat: Apache Tomcat: Security constraint bypass for CGI scripts CVE-2025-46701 org.apache.tomcat/tomcat-catalina: tomcat: Apache Tomcat: session...

Business Logic Vulnerability Apache Tomcat Dependency in Confluence Data Center

This High severity Business Logic vulnerability was introduced in versions 6.13.0, 7.4.0, 7.13.0, 7.19.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0 and 10.2.0 of Confluence Data Center. This Business Logic vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of...

CVE-2026-43512

A flaw was found in Apache Tomcat. When DIGEST authentication was configured, any user not known to the configured Realm would be authenticated if they presented the password "null". This allows a remote attacker to bypass security controls. Mitigation To mitigate this issue, disable DIGEST...

Apache Tomcat: Apache Tomcat: Information disclosure due to improper encoding in JsonAccessLogValve

A flaw was found in the JsonAccessLogValve component of Apache Tomcat. This improper encoding or escaping of output vulnerability could allow an attacker to inject specially crafted data into log files. This could lead to information disclosure or other unintended consequences when the logs are...

Apache Tomcat: Apache Tomcat: Authentication bypass via client certificate misconfiguration

A flaw was found in Apache Tomcat where OCSP-based certificate validation may incorrectly soft-fail during CLIENTCERT authentication, even when soft-fail is disabled, under certain FFM-related execution paths. This can result in client certificates being accepted despite failed or unverifiable...