CVE-2026-2742 : faille moyenne vaadin vaadin (CVSS 5.3)

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.

Sévérité

Moyenne (CVSS 5.3)

Vecteur CVSS

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploitation active

Non signalée par la CISA

Publication

10 mars 2026

Dernière mise à jour

17 juin 2026

• vaadin vaadin

• Fiche CVE-2026-2742 sur le NVD (NIST)
• github.com/vaadin/flow/pull/22998
• github.com/vaadin/flow/pull/23033
• github.com/vaadin/flow/pull/23034
• github.com/vaadin/flow/pull/23037
• github.com/vaadin/flow/pull/23052
• github.com/vaadin/flow/pull/23057
• vaadin.com/security/cve-2026-2742