Missing authentication in Shadowsocks
Priority LOW 35CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-306.
Summary
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.
Why it matters now
EPSS 0.01391 72nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Shadowsocks | Shadowsocks-libev 3.3.2 | — | No fix listed | CNA |
- Shadowsocks Vendor— Affected Shadowsocks-libev 3.3.2 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:shadowsocks:shadowsocks-libev:3.3.2:*:*:*:*:*:*:* | 3.3.2 | Vulnerable | Shadowsocks |
- cpe:2.3:a:shadowsocks:shadowsocks-libev:3.3.2:*:*:*:*:*:*:* Versions 3.3.2 Vulnerable ·Shadowsocks
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-5152
- 2026-10-03 Alias added: GHSA-pmr7-f238-jxqj
References
More Shadowsocks-libev vulnerabilities
- TI-2019-03619 Missing authentication in Shadowsocks CVSS 3.1HIGH 7.5
- TI-2017-11659 In manager.c in ss-manager in shadowsocks-libev 3.1.0, improper parsing allows command… CVSS 3.0HIGH 7.8
- TI-2019-03620 Missing authentication in Shadowsocks CVSS 3.1HIGH 7.8
Sources
- CVE-2019-5152 · CVE Program
- CVE-2019-5152 · NVD
- FIRST EPSS
- GHSA-pmr7-f238-jxqj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences