VYPR
← All advisories
Medium severity5.3NVD Advisory· Published Mar 10, 2026· Updated May 7, 2026

CVE-2026-2742

CVE-2026-2742

Description

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 a trailing slash bypasses security filters, and allowing unauthenticated users to trigger framework initialization and create sessions without proper authorization.

Users of affected versions using Spring Security should upgrade as follows: 14.0.0-14.14.0 upgrade to 14.14.1, 23.0.0-23.6.6 to 23.6.7, 24.0.0 - 24.9.7 to 24.9.8, and 25.0.0-25.0.1 upgrade to 25.0.2 or newer.

Please note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
com.vaadin:flow-serverMaven
< 14.14.114.14.1
com.vaadin:flow-serverMaven
>= 23.0.0, < 23.6.723.6.7
com.vaadin:flow-serverMaven
>= 24.0.0, < 24.9.824.9.8
com.vaadin:flow-serverMaven
>= 25.0.0, < 25.0.225.0.2
com.vaadin:vaadinMaven
>= 25.0.0, < 25.0.225.0.2
com.vaadin:vaadinMaven
>= 24.0.0, < 24.9.824.9.8
com.vaadin:vaadinMaven
>= 23.0.0, < 23.6.723.6.7
com.vaadin:vaadinMaven
< 14.14.114.14.1

Affected products

3
  • Vaadin/Vaadinv52 versions
    10.0.0+ 1 more
    • (no CPE)range: 10.0.0
    • cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*range: >=10.0.0,<14.14.1
  • vaadin/flowv5
    Range: 1.0.0

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

9

News mentions

0

No linked articles in our index yet.