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 Redis client RESP parser pre-allocates arrays to a length declared by the server without enforcing an upper bound. A malicious or compromised Redis server, or an attacker in a man-in-the-middle position, can send a crafted RESP response declaring an extremely large array, push, or attribute length, causing the client to attempt a massive heap allocation. The resulting OutOfMemoryError crashes the Vert.x event loop thread, denying service to all connections and verticles sharing that loop.
The impacted component is io.vertx:vertx-mysql-client.
{
"cna_assigner": "eclipse",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102465.json"
}{
"extracted_events": [
{
"introduced": "4.0.0"
},
{
"last_affected": "4.5.34"
},
{
"introduced": "5.0.0"
},
{
"last_affected": "5.0.12"
},
{
"introduced": "5.1.0"
},
{
"last_affected": "5.1.9"
},
{
"introduced": "5.2.0"
},
{
"last_affected": "5.2.0"
}
],
"source": "AFFECTED_FIELD"
}