CVE-2026-102462: Vulnerability in Eclipse Foundation Eclipse Vert.x
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 TDS message decoder in the Vert.x MSSQL client (vertx-mssql-client) aggregates inbound TDS packets into a composite direct-memory buffer without any cumulative size limit. A malicious, compromised, or man-in-the-middle SQL Server can send a continuous stream of TDS packets without setting the END_OF_MESSAGE status flag, causing unbounded direct-memory allocation on the client and leading to an out-of-memory crash. This occurs before authentication completes. The impacted component is io.vertx:vertx-mssql-client.
CVSS v4.0
Score 8.2high
Affected software
Eclipse Foundation
Eclipse Vert.x
pkg:maven/io.vertx/vertx-mssql-clientRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Eclipse Vert.x MSSQL client (vertx-mssql-client) affects versions >=4.0.0 <=4.5.34, >=5.0.0 <=5.0.12, >=5.1.0 <=5.1.9, and =5.2.0. The TDS message decoder aggregates inbound TDS packets into a composite direct-memory buffer without enforcing any cumulative size limit. An attacker controlling or intercepting the SQL Server can send a continuous stream of TDS packets lacking the END_OF_MESSAGE status flag, causing unbounded memory allocation on the client side. This leads to an out-of-memory crash before authentication is completed, potentially causing denial of service.
Potential Impact
Successful exploitation results in unbounded direct-memory allocation on the client, leading to an out-of-memory crash and denial of service. This occurs before authentication, meaning the attacker does not need valid credentials to trigger the condition. There is no indication of code execution or data leakage from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid connecting to untrusted or potentially compromised SQL Server instances. Monitor for updates from the Eclipse Foundation regarding patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- eclipse
- Date Reserved
- 2026-09-29T08:30:02.773Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad090022cdf04f656196483
Added to database: 10/15/2026, 08:34:10 UTC
Last enriched: 10/15/2026, 08:49:01 UTC
Last updated: 10/15/2026, 19:00:27 UTC
Views: 13
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