Denial of service in DataCommunicator class in Vaadin 8GHSA-j23j-q57m-63v3
MEDIUMFix: vaadin/framework#12415GHSA-j23j-q57m-63v3 is a medium-severity (CVSS 4.3) vulnerability in com.vaadin:vaadin-server. A fix is available for com.vaadin:vaadin-server — see the affected versions and patch details below.
Real-World Exposure
com.vaadin:vaadin-serverReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
Missing check in DataCommunicator class in com.vaadin:vaadin-server versions 8.0.0 through 8.14.0 (Vaadin 8.0.0 through 8.14.0) allows authenticated network attacker to cause heap exhaustion by requesting too many rows of data.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | com.vaadin:vaadin-server | ≥ 8.0.0&&< 8.14.1 | 8.14.1com.vaadin:vaadin-server:8.14.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.vaadin:vaadin-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update com.vaadin:vaadin-server to 8.14.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-j23j-q57m-63v3 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is GHSA-j23j-q57m-63v3 in your dependencies?
Find it across Maven, including transitive dependencies.