The Java WebSocket client nv-websocket-client does not verify that the server hostname…
Priority LOW 27CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-295.
Summary
The Java WebSocket client nv-websocket-client does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL/TLS servers via an arbitrary valid certificate.
Why it matters now
EPSS 0.0066 51st percentileScored 2026-11-07
Fix Fixed com.neovisionaries:nv-websocket-client (Maven): 2.1
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | com.neovisionaries:nv-websocket-client (Maven) | before 2.1 | 2.1 | Patch available | GHSA-4hxv-95rc-jqg7 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- com.neovisionaries:nv-websocket-client (Maven) Vendor— Affected before 2.1 Fixed in 2.1 Patch available GHSA-4hxv-95rc-jqg7
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nv-websocket-client_project:nv-websocket-client:*:*:*:*:*:*:*:* | up to 2.2 | Vulnerable | Nv-websocket-client Project |
- cpe:2.3:a:nv-websocket-client_project:nv-websocket-client:*:*:*:*:*:*:*:* Versions up to 2.2 Vulnerable ·Nv-websocket-client Project
Remediation
- Fix · GHSA-4hxv-95rc-jqg7 com.neovisionaries:nv-websocket-client (Maven) Fixed in 2.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2017-1000209
- 2026-10-03 Alias added: GHSA-4hxv-95rc-jqg7
- 2026-10-08 EPSS moved to the 50th–90th percentile
References
Sources
- CVE-2017-1000209 · CVE Program
- CVE-2017-1000209 · NVD
- FIRST EPSS
- GHSA-4hxv-95rc-jqg7 · 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