CVE-2019-5152: Shadowsocks Shadowsocks-Libev

High severity, CVSS 7.4. EPSS: 1.4% chance of exploitation in the next 30 days.

An exploitable information disclosure vulnerability exists in the network packet handling functionality of Shadowsocks-libev 3.3.2. When utilizing a Stream Cipher, a specially crafted set of network packets can cause an outbound connection from the server, resulting in information disclosure. An attacker can send arbitrary packets to trigger this vulnerability.

Affected products

• Shadowsocks Shadowsocks-Libev: version 3.3.2 only

Published 2019-12-18. Last modified 2026-06-17.