What’s Vulnerable › Vulnerabilities

CVE-2020-11050: Improper Validation of Certificate with Host Mismatch in Java-WebSocket

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-07 · updated 2026-06-17
• Weakness: CWE-297

Description

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.

Affected products

• TooTallNate Java-WebSocket: through 1.4.1

References

• https://github.com/TooTallNate/Java-WebSocket/security/advisories/GHSA-gw55-jm4h-x339
• https://github.com/TooTallNate/Java-WebSocket/security/advisories/GHSA-gw55-jm4h-x339

Get alerted when CVE-2020-11050 or the next vulnerability affects your stack