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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-2742 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  Vaadin Ltd.
CVSS-B 5.3 MEDIUM
Vector:  CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/S:N/AU:Y/R:A/V:D/RE:L/U:Amber

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/vaadin/flow/pull/22998 Vaadin Ltd.
https://github.com/vaadin/flow/pull/23033 Vaadin Ltd.
https://github.com/vaadin/flow/pull/23034 Vaadin Ltd.
https://github.com/vaadin/flow/pull/23037 Vaadin Ltd.
https://github.com/vaadin/flow/pull/23052 Vaadin Ltd.
https://github.com/vaadin/flow/pull/23057 Vaadin Ltd.
https://vaadin.com/security/cve-2026-2742 Vaadin Ltd.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-284 Improper Access Control Vaadin Ltd.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-2742
NVD Published Date:
03/10/2026
NVD Last Modified:
03/11/2026
Source:
Vaadin Ltd.