AIKIDO-2026-336077
vertx-mssql-client is vulnerable to Denial of Service (DoS)
59
CVE Score
Medium
Denial of Service (DoS)
TL;DR
The TDS decoder in vertx-mssql-client appends inbound packets to one buffer until it sees the end of message flag, and it does not cap the total size. A SQL Server can omit that flag, including before login, and grow the client's direct memory until the process crashes. The fix stops reassembly once the buffered size passes a limit.
How do I fix this?
Upgrade the io.vertx:vertx-mssql-client library to the patch version.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and the client connects to a SQL Server you do not trust.
Package
Versions
4.0.0 - 4.5.34
Fixed in 4.5.355.0.0 - 5.1.8
Fixed in 5.1.105.2.0 - 5.2.0
Fixed in 5.2.1Background info
vertx-mssql-client is vulnerable to Denial of Service (DoS) in versions 4.0.0 - 4.5.34, 5.0.0 - 5.1.8 and 5.2.0 - 5.2.0.
Links
Get secure today,
quickly and for free.
Secure your code, cloud, and runtime in one central system. Connect a repo to discover what the reasoning agents find in your codebase.
No credit card required | Scan results in 32 seconds.
I consent to receiving marketing communications based on Aikido’s Privacy Policy.
SOC 2Compliant
ISO 27001CompliantISO 42001Compliant
FedRAMPAuthorized© All Intel data is openly available and commercially licensed.