Authentication Bypass by Primary Weakness

Overview org.apache.tomcat:tomcat is an implementation of the Java Servlet, JavaServer Pages, Java Expression Language and Java WebSocket technologies. Affected versions of this package are vulnerable to Authentication Bypass by Primary Weakness in the authentication process when using certain...

EUVD-2026-66135

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

Linux Distros Unpatched Vulnerability : CVE-2026-68569

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 meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the...

DEBIAN-CVE-2026-68569

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

CVE-2026-68569

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

CVE-2026-68569 Apache Tomcat: Principal lookup can fail open in some cases

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

CVE-2026-68569 Apache Tomcat: Principal lookup can fail open in some cases

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

CVE-2026-68569

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

CVE-2026-68569

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

CVE-2026-68569 Apache Tomcat: Principal lookup can fail open in some cases

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

CVE-2026-68569

Apache Tomcat contains an Improper Authentication vulnerability (CVE-2026-68569 ) where users may be authenticated even if they do not exist in the DataSourceRealm under certain circumstances, such as when using CLIENT-CERT or SPNEGO . This issue impacts versions 11.0.0-M1 through 11.0.24 , 10.1....

CVE-2026-68569: Improper Authentication

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

PT-2026-81888

Name of the Vulnerable Software and Affected Versions Apache Tomcat versions 11.0.0-M1 through 11.0.24 Apache Tomcat versions 10.1.0-M1 through 10.1.57 Apache Tomcat versions 9.0.0.M1 through 9.0.120 Apache Tomcat versions 8.5.0 through 8.5.100 Apache Tomcat versions 7.0.0 through 7.0.109...

OPENSUSE-SU-2026:21486-1 Security update for tomcat

This update for tomcat fixes the following issues: Update to Tomcat 9.0.120. Security issues fixed: - CVE-2026-59083: incorrect URL decoding in RewriteValve may allow security control bypass bsc1271397. - CVE-2026-59084: EncryptInterceptor requirements are not clearly documented bsc1271398. Other...

CVE-2009-0580

Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, and 6.0.0 through 6.0.18, when FORM authentication is used, allows remote attackers to enumerate valid usernames via requests to /jsecuritycheck with malformed URL encoding of passwords, related to improper error checking in the 1...

[SECURITY] CVE-2009-0580 UPDATED Apache Tomcat User enumeration vulnerability with FORM authentication

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Updated to clarify affected versions as they vary for each affected Realm. CVE-2009-0580: Tomcat information disclosure vulnerability Severity: Low Vendor: The Apache Software Foundation Versions Affected: MemoryRealm: Tomcat 4.1.0 to 4.1.39 Tomcat...

[SECURITY] CVE-2009-0580 Apache Tomcat User enumeration vulnerability with FORM authentication

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 CVE-2009-0580: Tomcat information disclosure vulnerability Severity: Low Vendor: The Apache Software Foundation Versions Affected: Tomcat 4.1.0 to 4.1.39 Tomcat 5.5.0 to 5.5.27 Tomcat 6.0.0 to 6.0.18 The unsupported Tomcat 3.x, 4.0.x and 5.0.x version...

CVE-2009-0580: Exposure of Sensitive Information to an Unauthorized Actor

Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, and 6.0.0 through 6.0.18, when FORM authentication is used, allows remote attackers to enumerate valid usernames via requests to /jsecuritycheck with malformed URL encoding of passwords, related to improper error checking in the 1...

Apache Tomcat表单认证用户名枚举漏洞

BUGTRAQ ID: 35196 CVECAN ID: CVE-2009-0580 Apache Tomcat是一个流行的开放源码的JSP应用服务器程序。 由于某些认证类中的不充分错误检查，如果远程攻击者向Tomcat服务器提交了非法URL编码的口令就可能通过返回判断是否存在所请求的用户名。如果基于表单的认证（jsecuritycheck）使用了任意以下认证域就可以执行这种攻击： MemoryRealm DataSourceRealm JDBCRealm Apache Group Tomcat 6.0.x Apache Group Tomcat 5.5.x Apache Group...