Path Traversal in Vaadin Flow
CVE-2026-2741
Specially crafted ZIP archives can escape the intended extraction directory during Node.js download and extraction in Vaadin 14.2.0 through 14.14.0, 15.0.0 through 23.6.6, 24.0.0 through 24.9.8, and 25.0.0 through 25.0.2. Vaadin’s build process can automatically download and extract Node.js if it is not installed locally. If an attacker can intercept or control this download via DNS hijacking, a MITM attack, a compromised mirror, or a supply chain attack, they can serve a malicious archive containing path traversal sequences that write files outside the intended extraction directory. Users of affected versions should use a globally preinstalled Node.js version compatible with their Vaadin version, or upgrade as follows: 14.2.0-14.14.0 to 14.14.1, 15.0.0-23.6.6 to 23.6.7, 24.0.0-24.9.8 to 24.9.9, and 25.0.0-25.0.2 to 25.0.3 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.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.003 (27.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N.
Affected products
- Vaadin Flow — versions 2.2.0, 3.0.0, 24.0.0
- Vaadin — versions 14.2.0, 15.0.0, 24.0.0
Weakness classification (CWE)
References
- security@vaadin.com (Vendor Advisory)
- security@vaadin.com (Patch, Issue Tracking)
- security@vaadin.com (Patch, Issue Tracking)
- security@vaadin.com (Patch, Issue Tracking)
- security@vaadin.com (Patch, Issue Tracking)
- security@vaadin.com (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-2741?
- CVE-2026-2741 is a medium-severity vulnerability in Vaadin Flow, classified under Path Traversal. CVSS score: 6.8/10. Published 2026-03-10.
- How severe is CVE-2026-2741?
- Medium severity. CVSS v3 base score is 6.8 out of 10.