Description
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Eclipse Foundation | Eclipse Vert.x | >= 4.0.0, <= 4.5.34; >= 5.0.0, <= 5.0.12; >= 5.1.0, <= 5.1.9; 5.2.0 |
References
- https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-xqmh-8fhj-48fpVendor Advisory
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/345Issue Tracking, Third Party Advisory
Timeline
- Published
- Oct 15, 2026
- Last modified
- Oct 20, 2026
- NVD status
- Analyzed