Access Control Bypass Affecting com.vaadin:flow-server package, versions [23.0.0,23.6.7)[24.0.0,24.9.8)[25.0.0-beta1,25.0.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published10 Mar 2026
- disclosed10 Mar 2026
- creditUnknown
Introduced: 10 Mar 2026
CVE-2026-2742 (opens in a new tab)How to fix?
Upgrade com.vaadin:flow-server to version 23.6.7, 24.9.8, 25.0.2 or higher.
Overview
Affected versions of this package are vulnerable to Access Control Bypass due to inconsistent path pattern matching of reserved framework paths. An attacker can create unauthorized sessions and trigger framework initialization by accessing the /VAADIN endpoint without a trailing slash, thereby bypassing security filters.