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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-xqmh-8fhj-48fp	Vendor Advisory
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/345	Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:eclipse:vert.x::::::::
	cpe:2.3:a:eclipse:vert.x::::::::
	cpe:2.3:a:eclipse:vert.x:5.2.0:::::::*

History

20 Oct 2026, 19:28

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.9
First Time		Eclipse Eclipse vert.x
CPE		cpe:2.3:a:eclipse:vert.x:::::::: cpe:2.3:a:eclipse:vert.x:5.2.0:::::::*
References	~~() https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-xqmh-8fhj-48fp -~~	() https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-xqmh-8fhj-48fp - Vendor Advisory
References	~~() https://gitlab.eclipse.org/security/cve-assignment/-/work_items/345 -~~	() https://gitlab.eclipse.org/security/cve-assignment/-/work_items/345 - Issue Tracking, Third Party Advisory

15 Oct 2026, 15:17

Type	Values Removed	Values Added
CWE		CWE-789

15 Oct 2026, 09:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-15 09:17

Updated : 2026-10-20 19:28

NVD link : CVE-2026-102463

Mitre link : CVE-2026-102463

CVE.ORG link : CVE-2026-102463

JSON object : View

Products Affected

eclipse

vert.x

CWE

CWE-789

Memory Allocation with Excessive Size Value

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