📄 Vaadin 25.x Authentication Bypass

An authentication bypass affects Vaadin versions 6.8.13, 14.x, 23.x, 24.x, and 25.x when used with Spring Security, due to inconsistent path pattern matching on reserved framework routes. Accessing the /VAADIN endpoint without a trailing slash can bypass security filters, allowing unauthenticated...

GHSA-RJGH-WGC7-M37J Vaadin Vulnerable to Authentication Bypass When Accessing the /VAADIN Endpoint Without a Trailing Slash

An authentication bypass vulnerability exists in Vaadin 14.0.0 through 14.14.0, 23.0.0 through 23.6.6, 24.0.0 through 24.9.7 and 25.0.0 through 25.0.1, applications using Spring Security due to inconsistent path pattern matching of reserved framework paths. Accessing the /VAADIN endpoint without ...

Vaadin Vulnerable to Authentication Bypass When Accessing the /VAADIN Endpoint Without a Trailing Slash

An authentication bypass vulnerability exists in Vaadin 14.0.0 through 14.14.0, 23.0.0 through 23.6.6, 24.0.0 through 24.9.7 and 25.0.0 through 25.0.1, applications using Spring Security due to inconsistent path pattern matching of reserved framework paths. Accessing the /VAADIN endpoint without ...

CVE-2026-2742

An authentication bypass vulnerability exists in Vaadin 14.0.0 through 14.14.0, 23.0.0 through 23.6.6, 24.0.0 through 24.9.7 and 25.0.0 through 25.0.1, applications using Spring Security due to inconsistent path pattern matching of reserved framework paths. Accessing the /VAADIN endpoint without ...

CVE-2026-2742 Unauthorized session creation via reserved framework path access

An authentication bypass vulnerability exists in Vaadin 14.0.0 through 14.14.0, 23.0.0 through 23.6.6, 24.0.0 through 24.9.7 and 25.0.0 through 25.0.1, applications using Spring Security due to inconsistent path pattern matching of reserved framework paths. Accessing the /VAADIN endpoint without ...

PT-2026-24206

Name of the Vulnerable Software and Affected Versions Vaadin versions 14.0.0 through 14.14.0 Vaadin versions 23.0.0 through 23.6.6 Vaadin versions 24.0.0 through 24.9.7 Vaadin versions 25.0.0 through 25.0.1 Description An authentication bypass issue exists in applications using Spring Security...

GHSA-P7JQ-V8JP-J424 Timing side channel vulnerability in endpoint request handler in Vaadin 15-19

Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 Vaadin 15.0.0 through 18.0.6, and com.vaadin:fusion-endpoint version 6.0.0 Vaadin 19.0.0 allows attacker to guess a security token for Fusion endpoints via timing attack....