Medium severity · published Oct 15, 2026
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)…
5.9
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EV
Eclipse Vert.x · Eclipse Foundation
4.0.0 through 4.5.34; 5.0.0 through 5.0.12; 5.1.0 through 5.1.9; 5.2.0 · source: vendor
VE
Vert.x · Eclipse
4.5.0 before 4.5.35; 5.0.0 before 5.1.10; 5.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102463
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102463
Vendor Advisory
https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-xqmh-8fhj-48fp
Issue Tracking
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/345
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