CVE-2026-68763

Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120. The following versions were...

CVE-2026-68763

CVE-2026-68763 is an Uncontrolled Resource Consumption vulnerability in Apache Tomcat caused by an allocation leak in the HTTP/2 backlog tracking when a stream is reset. This can lead to denial of service on the affected server. The vulnerability affects Tomcat 11.0.0-M1 through 11.0.24 , 10.1.0-...

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

Apache Tomcat contains an improper authentication flaw in the DataSourceRealm principal lookup. Under specific authentication methods—CLIENT-CERT and SPNEGO —a user could be authenticated even if they did not exist in the DataSourceRealm, effectively a fail-open condition. The issue affects 11.0....

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-2026-68525

An Incorrect Authorization flaw in Apache Tomcat 's FORM authentication process allows bypassing a security constraint that limits a user to POST access while denying GET . A redirect after successful FORM authentication can cause the constraint check to evaluate the wrong HTTP method, granting a...

CVE-2026-68525 Apache Tomcat: Redirect after FORM auth may bypass method specific constraints

Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a security constraint that limits user has access to a resource POST but not GET. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from...

CVE-2026-68525

Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a security constraint that limits user has access to a resource POST but not GET. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from...

CVE-2026-68525 Apache Tomcat: Redirect after FORM auth may bypass method specific constraints

Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a security constraint that limits user has access to a resource POST but not GET. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from...

CVE-2026-68525 Apache Tomcat: Redirect after FORM auth may bypass method specific constraints

Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a security constraint that limits user has access to a resource POST but not GET. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from...

CVE-2026-66422 Apache Tomcat: Servlet role references can bypass declarative role constraints

Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 throu...

CVE-2026-66422 Apache Tomcat: Servlet role references can bypass declarative role constraints

Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 throu...

CVE-2026-66422 Apache Tomcat: Servlet role references can bypass declarative role constraints

Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 throu...

CVE-2026-66422

This is an Improper Authorization vulnerability in Apache Tomcat where security-role-ref definitions were incorrectly treated as role aliases within the Realm , enabling a bypass of declarative role constraints beyond the intended Request.isUserInRole() mechanism. Affected releases span 11.0.0-M1...

CVE-2026-66422

Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 throu...

CVE-2026-65927

An off-by-one error in the RewriteValve of Apache Tomcat affecting the [N] flag causes rewrite processing to restart at the second rule rather than the first, which may bypass access control . Affected versions include 11.0.0-M1 through 11.0.24 , 10.1.0-M1 through 10.1.57 , 9.0.0-M1 through 9.0.1...

CVE-2026-65927 Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control

Off-by-one Error vulnerability in Apache Tomcat impacting the N flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through...

CVE-2026-65927

Off-by-one Error vulnerability in Apache Tomcat impacting the N flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through...