Vulnerability Details CVE-2026-102466
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 16.5%
CVSS Severity
CVSS v3 Score 5.9
References
Products affected by CVE-2026-102466
-
cpe:2.3:a:eclipse:vert.x:4.5.0
-
cpe:2.3:a:eclipse:vert.x:4.5.1
-
cpe:2.3:a:eclipse:vert.x:4.5.10
-
cpe:2.3:a:eclipse:vert.x:4.5.11
-
cpe:2.3:a:eclipse:vert.x:4.5.12
-
cpe:2.3:a:eclipse:vert.x:4.5.13
-
cpe:2.3:a:eclipse:vert.x:4.5.14
-
cpe:2.3:a:eclipse:vert.x:4.5.15
-
cpe:2.3:a:eclipse:vert.x:4.5.16
-
cpe:2.3:a:eclipse:vert.x:4.5.17
-
cpe:2.3:a:eclipse:vert.x:4.5.18
-
cpe:2.3:a:eclipse:vert.x:4.5.19
-
cpe:2.3:a:eclipse:vert.x:4.5.2
-
cpe:2.3:a:eclipse:vert.x:4.5.20
-
cpe:2.3:a:eclipse:vert.x:4.5.21
-
cpe:2.3:a:eclipse:vert.x:4.5.22
-
cpe:2.3:a:eclipse:vert.x:4.5.23
-
cpe:2.3:a:eclipse:vert.x:4.5.24
-
cpe:2.3:a:eclipse:vert.x:4.5.25
-
cpe:2.3:a:eclipse:vert.x:4.5.26
-
cpe:2.3:a:eclipse:vert.x:4.5.27
-
cpe:2.3:a:eclipse:vert.x:4.5.28
-
cpe:2.3:a:eclipse:vert.x:4.5.29
-
cpe:2.3:a:eclipse:vert.x:4.5.3
-
cpe:2.3:a:eclipse:vert.x:4.5.30
-
cpe:2.3:a:eclipse:vert.x:4.5.31
-
cpe:2.3:a:eclipse:vert.x:4.5.32
-
cpe:2.3:a:eclipse:vert.x:4.5.33
-
cpe:2.3:a:eclipse:vert.x:4.5.34
-
cpe:2.3:a:eclipse:vert.x:4.5.4
-
cpe:2.3:a:eclipse:vert.x:4.5.5
-
cpe:2.3:a:eclipse:vert.x:4.5.6
-
cpe:2.3:a:eclipse:vert.x:4.5.7
-
cpe:2.3:a:eclipse:vert.x:4.5.8
-
cpe:2.3:a:eclipse:vert.x:4.5.9
-
cpe:2.3:a:eclipse:vert.x:5.0.0
-
cpe:2.3:a:eclipse:vert.x:5.0.1
-
cpe:2.3:a:eclipse:vert.x:5.0.10
-
cpe:2.3:a:eclipse:vert.x:5.0.11
-
cpe:2.3:a:eclipse:vert.x:5.0.12
-
cpe:2.3:a:eclipse:vert.x:5.0.2
-
cpe:2.3:a:eclipse:vert.x:5.0.3
-
cpe:2.3:a:eclipse:vert.x:5.0.4
-
cpe:2.3:a:eclipse:vert.x:5.0.5
-
cpe:2.3:a:eclipse:vert.x:5.0.6
-
cpe:2.3:a:eclipse:vert.x:5.0.7
-
cpe:2.3:a:eclipse:vert.x:5.0.8
-
cpe:2.3:a:eclipse:vert.x:5.0.9
-
cpe:2.3:a:eclipse:vert.x:5.1.0
-
cpe:2.3:a:eclipse:vert.x:5.1.1
-
cpe:2.3:a:eclipse:vert.x:5.1.2
-
cpe:2.3:a:eclipse:vert.x:5.1.3
-
cpe:2.3:a:eclipse:vert.x:5.1.4
-
cpe:2.3:a:eclipse:vert.x:5.1.5
-
cpe:2.3:a:eclipse:vert.x:5.1.8
-
cpe:2.3:a:eclipse:vert.x:5.1.9
-
cpe:2.3:a:eclipse:vert.x:5.2.0