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CVE-2026-102463

8.2 high SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 6

  1. Cpes+2 CPE criteria (now 2)NVD modified 2026-10-20 19:28
  2. StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-20 19:28
  3. CwesCWE-789NVD modified 2026-10-15 15:17
  4. StatusAwaiting Analysis → Undergoing AnalysisNVD modified 2026-10-15 15:17
  5. StatusReceived → Awaiting AnalysisNVD modified 2026-10-15 14:41
  6. First seenCVSS 8.2NVD modified 2026-10-15 09:17

Affected (CPE criteria) 2

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

References 2