CVE-2026-102463

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 binary array decoder in vertx-pg-client (DataTypeCodec.binaryDecodeArray) allocates a Java array sized by a server-declared 32-bit dimension count with no upper bound. A malicious or compromised PostgreSQL server, or an on-path attacker intercepting an unencrypted connection, can send a crafted DataRow message with an excessively large array dimension value, causing the client to attempt a multi-gigabyte heap allocation and crash with an OutOfMemoryError. The impacted component is io.vertx:vertx-pg-client.

Score

CVSS 4.0 8.2 High

Status

Analyzed - emo@eclipse.org

Published

2026-10-15

Last modified

2026-10-20

Weaknesses

CWE-789

Affected products

• Vert.x (Eclipse)
• Eclipse Vert.x (Eclipse Foundation)

References

• https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-xqmh-8fhj-48fp
• https://gitlab.eclipse.org/security/cve-assignment/-/work_items/345