CVE-2018-11713: Gnome Libsoup

Medium severity, CVSS 6.5. EPSS: 1.6% chance of exploitation in the next 30 days.

WebCore/platform/network/soup/SocketStreamHandleImplSoup.cpp in the libsoup network backend of WebKit, as used in WebKitGTK+ prior to version 2.20.0 or without libsoup 2.62.0, unexpectedly failed to use system proxy settings for WebSocket connections. As a result, users could be deanonymized by crafted web sites via a WebSocket connection.

Affected products

• Gnome Libsoup: before 2.62.0 (fixed in 2.62.0)
• WebKitGTK Webkitgtk+: before 2.20.0 (fixed in 2.20.0)

Published 2018-06-04. Last modified 2026-06-17.