CVE-2026-2742

Summary

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 Software

VendorProductVersion RangeStatus
vaadinvaadin10.0.0 <= 14.14.0affected
vaadinvaadin15.0.0 <= 23.6.6affected
vaadinvaadin24.0.0 <= 24.9.7affected
vaadinvaadin25.0.0 <= 25.0.1affected
vaadinflow1.0.0 <= 2.13.0affected
vaadinflow3.0.0 <= 23.6.7affected
vaadinflow24.0.0 <= 24.9.7affected
vaadinflow25.0.0 < 25.0.1affected

Weaknesses

  • CWE-284: CWE-284 Improper Access Control

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References