CVE-2018-12541: Eclipse Vert.x

Medium severity, CVSS 6.5. EPSS: 2.7% chance of exploitation in the next 30 days.

In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the WebSocket HTTP upgrade implementation buffers the full http request before doing the handshake, holding the entire request body in memory. There should be a reasonnable limit (8192 bytes) above which the WebSocket gets an HTTP response with the 413 status code and the connection gets closed.

Affected products

• Eclipse Vert.x: from 3.0.0, before 3.5.4 (fixed in 3.5.4)

Published 2018-10-10. Last modified 2026-06-17.