CVE-2019-5152

An exploitable information disclosure vulnerability exists in the network packet handling...

7.4 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

1.39%Up 1.0 points since Apr 14, 2021

What each source reports

CVE List Score used 7.4

Record: CVE-2019-5152
CVSS 3.0: 7.4 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-306
Updated: 2026-11-02

EUVDEUVD-2019-14757 7.4

Record: EUVD-2019-14757
CVSS 3.0: 7.4 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pmr7-f238-jxqj 7.4

An exploitable information disclosure vulnerability exists in the network packet handling...

Record: GHSA-pmr7-f238-jxqj
CVSS 3.1: 7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-306
Updated: 2026-11-02

NVD 7.4

Record: CVE-2019-5152
CVSS 3.1: 7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 3.0: 7.4 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0: 5.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:N
Weakness: CWE-306
Updated: 2026-11-02

OSV 7.4

Record: CVE-2019-5152
CVSS 3.1: 7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2019-5152 7.4

Record: DEBIAN-CVE-2019-5152
CVSS 3.1: 7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2019-5152 7.4

Record: UBUNTU-CVE-2019-5152
CVSS 3.1: 7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 3.0: 7.4 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

Affected products

shadowsocks shadowsocks-libev

Affected packages

Affected packages
Package	Affected	Fixed
`shadowsocks-libev` Debian:12	All versions, plus listed versions 3.3.5+ds-103.3.5+ds-113.3.5+ds-123.3.5+ds-133.3.5+ds-14 Show 5 moreShow less 3.3.5+ds-153.3.5+ds-163.3.6+ds-13.3.6+ds-23.3.6+ds-3	None known
`shadowsocks-libev` Debian:13	All versions, plus listed versions 3.3.5+ds-163.3.6+ds-13.3.6+ds-23.3.6+ds-3	None known
`shadowsocks-libev` Ubuntu:18.04:LTS	All versions, plus listed versions 3.0.8+ds-23.1.0+ds-33.1.0+ds-43.1.0+ds-53.1.1+ds-1 Show 4 moreShow less 3.1.1+ds-23.1.1+ds-33.1.3+ds-1ubuntu13.1.3+ds-1ubuntu2	None known
`shadowsocks-libev` Ubuntu:20.04:LTS	All versions, plus listed versions 3.3.1+ds-13.3.2+ds-13.3.3+ds-13.3.3+ds-33.3.4+ds-13.3.4+ds-1ubuntu13.3.4+ds-2	None known
`shadowsocks-libev` Ubuntu:22.04:LTS	All versions, plus listed versions 3.3.5+ds-43.3.5+ds-63.3.5+ds-73.3.5+ds-7build1	None known
`shadowsocks-libev` Ubuntu:24.04:LTS	All versions, plus listed versions 3.3.5+ds-103.3.5+ds-10build13.3.5+ds-10build23.3.5+ds-10build3	None known
`shadowsocks-libev` Ubuntu:25.10	All versions, plus listed versions 3.3.5+ds-16	None known
`shadowsocks-libev` Ubuntu:26.10	All versions, plus listed versions 3.3.5+ds-16build13.3.6+ds-3ubuntu1	None known
`shadowsocks-libev` Ubuntu:26.04:LTS	All versions, plus listed versions 3.3.5+ds-163.3.5+ds-16build1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-5152 is a high vulnerability (CVSS 7.4) in Shadowsocks Shadowsocks-libev, published December 18, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.39%, the 72nd percentile. No source names a fixed version.