5.3

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 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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Vaadin ≫ Vaadin Version >= 10.0.0 < 14.14.1
Vaadin ≫ Vaadin Version >= 15.0.0 < 23.6.7
Vaadin ≫ Vaadin Version >= 24.0.0 < 24.9.8
Vaadin ≫ Vaadin Version >= 25.0.0 < 25.0.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.39% 0.307
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.3 3.9 1.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
security@vaadin.com 5.3 0 0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:A/V:D/RE:L/U:Amber
CWE-284 Improper Access Control

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

https://vaadin.com/security/cve-2026-2742
Vendor Advisory
https://github.com/vaadin/flow/pull/22998
Patch
Issue Tracking
https://github.com/vaadin/flow/pull/23037
Patch
Issue Tracking
https://github.com/vaadin/flow/pull/23057
Patch
Issue Tracking
https://github.com/vaadin/flow/pull/23033
Patch
Issue Tracking
https://github.com/vaadin/flow/pull/23034
Patch
Issue Tracking
https://github.com/vaadin/flow/pull/23052
Patch
Issue Tracking