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 Packages

Maven io.vertx:vertx-core

Affected versions: 3.0.0 (fixed in 3.5.4)

Related CVEs

CVE-2018-12541

Key Information

GHSA ID

GHSA-45xm-v8gq-7jqx

Published

October 17, 2018 4:19 PM

Last Modified

April 25, 2022 8:23 PM

CVSS Score

5.0 /10

Primary Ecosystem

Maven

Primary Package

io.vertx:vertx-core

GitHub Reviewed

✓ Yes

Dataset

Last updated: November 26, 2025 6:30 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.