CVE-2026-102466
CVE-2026-102466
This page contains facts from public vulnerability sources. Check the original advisory before updating.
In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x MySQL client (vertx-mysql-client) pre-allocates an array for column definitions based on a server-declared column count with no upper-bound validation. A malicious or compromised MySQL server, or an attacker with man-in-the-middle positioning, can send a crafted result set packet with an extremely large column count, causing the client to attempt a massive heap allocation. The resulting OutOfMemoryError crashes the Netty event loop thread, causing a complete denial of service for all connections and verticles in the Vert.x application. The impacted component is io.vertx:vertx-mysql-client.
CVSS 8.2 · High · EPSS 0.3%
- Published
- Updated
Affected products and versions
eclipse vert.x
- Versions
- ≥ 4.0.0, ≤ 4.5.34: Affected (semver)
- ≥ 5.0.0, ≤ 5.0.12: Affected (semver)
- ≥ 5.1.0, ≤ 5.1.9: Affected (semver)
- 5.2.0: Affected (semver)
No fix published