CVE-2026-102463
Eclipse Vert.x: denial of service
- Risk score
- 40/100
- CVSS
- 5.9 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 15 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 a…
- Affected
- Eclipse Vert.x
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Story map
At a glance
Eclipse Vert.x: Yellow, plan it in. 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 PostgreSQL message decoder reads the 4-byte message length field from the PostgreSQL wire protocol without any maximum validation. A malicious, compromised, or man-in-the-middle PostgreSQL server can send a message hea…
The flaws
- CVE-2026-102463: Denial of service (CVSS 5.9 · EPSS 0%)
- CVE-2026-103223: Denial of service (CVSS 5.9 · EPSS 0%)
- CVE-2026-102465: Denial of service (CVSS 5.9 · EPSS 0%)
- CVE-2026-102469: Unsafe deserialisation can lead to remote code execution (CVSS 5.9 · EPSS 0%)
The fix
Fix: Apply the vendor's security update; see the linked advisory.
Who is exposed: Eclipse Vert.x
Where it stands
- No known exploitation
Connects to
- Same weakness: CWE-789 (CWE-789). 45 other warnings in 30 days
- Same product: Earlier Eclipse Vert.x warnings. 11 in the last 90 days
Why it is Yellow
- CVSS 5.9 medium
References
Original 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.
Last activity 15 Oct 2026. Patch Forecast updates every hour.