Improper Validation of Certificate with Host Mismatch in Java-WebSocket
Priority MEDIUM 40CWE-297Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-295.
Summary
In Java-WebSocket less than or equal to 1.4.1, there is an Improper Validation of Certificate with Host Mismatch where WebSocketClient does not perform SSL hostname validation. This has been patched in 1.5.0.
Why it matters now
EPSS 0.00791 56th percentileScored 2026-11-07
Fix Fixed org.java-websocket:Java-WebSocket (Maven): 1.5.0
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 |
|---|---|---|---|---|---|
| TooTallNate | Java-WebSocket | up to 1.4.1 | — | No fix listed | CNA |
| — | org.java-websocket:Java-WebSocket (Maven) | before 1.5.0 | 1.5.0 | Patch available | GHSA-gw55-jm4h-x339 |
- Java-WebSocket VendorTooTallNate Affected up to 1.4.1 Fixed in — No fix listed CNA
- org.java-websocket:Java-WebSocket (Maven) Vendor— Affected before 1.5.0 Fixed in 1.5.0 Patch available GHSA-gw55-jm4h-x339
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:java-websocket_project:java-websocket:*:*:*:*:*:*:*:* | up to 1.4.1 | Vulnerable | Java-websocket Project |
- cpe:2.3:a:java-websocket_project:java-websocket:*:*:*:*:*:*:*:* Versions up to 1.4.1 Vulnerable ·Java-websocket Project
Remediation
- Fix · GHSA-gw55-jm4h-x339 org.java-websocket:Java-WebSocket (Maven) Fixed in 1.5.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 2 products
- Red Hat Fuse 7
- Red Hat Integration Camel K 1
Timeline
- 2026-10-02 Threatist record created from CVE-2020-11050
- 2026-10-03 Alias added: GHSA-gw55-jm4h-x339
References
More TooTallNate vulnerabilities
- TI-2026-61598 TooTallNate Java-WebSocket Fragmentation Draft_6455.java processFrameContinuousAndNonFin allocation of resources CVSS 4.0MEDIUM 6.9
- TI-2026-86123 Uncontrolled resource consumption in plist.js binary plist parser CVSS 4.0HIGH 8.7
Sources
- CVE-2020-11050 · CVE Program
- CVE-2020-11050 · NVD
- FIRST EPSS
- GHSA-gw55-jm4h-x339 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-11050 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences