Remediation:
Upgrade to io.vertx:vertx-web-client@4.5.24.
Overview
io.vertx:vertx-core is a tool-kit for building reactive applications on the JVM.
Affected versions of this package are vulnerable to HTTP Request Smuggling due to improper handling of / in the output buffer by removeDots() function in Static Handler. An attacker can prevent access to static files by sending specifically crafted request URIs that exploit improper handling of encoded path traversal sequences.
Workaround
This vulnerability can be mitigated by disabling the Static Handler cache.
Remediation
Upgrade io.vertx:vertx-core to version 4.5.24 or higher.