CVE-2026-102463

State: Published
Severity: 8.2 High
Published: Oct 15, 2026
Updated: Oct 15, 2026
Reserved: Sep 29, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.2 High	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	eclipse

Weaknesses

CWE-789 Memory Allocation with Excessive Size Value

Affected Products

Product	Versions
Eclipse Vert.xEclipse Foundation	4.0.0 through 4.5.34Affected 5.0.0 through 5.0.12Affected 5.1.0 through 5.1.9Affected 5.2.0Affected

References

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