CVE-2026-6860

Name: CVE-2026-6860
Creator: NVD / NIST
Published: 2026-05-06T10:16:26.293+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2026-6860 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. A TCP client can perform a TLS handshake and present the server name extension with a server name that is accepted by a server wildcard name, e.g. if the server is configured with a certificate accepting *.example.com, any XYZ.example.com where xyz is a valid name can be used.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

A TCP client can perform a TLS handshake and present the server name extension with a server name that is accepted by a server wildcard name, e.g. if the server is configured with a certificate accepting *.example.com, any XYZ.example.com where xyz is a valid name can be used.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS 4.0

6.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.24%

14.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Eclipse	Vert.X	>= 4.3.4, <= 4.5.26
Eclipse	Vert.X	>= 5.0.0, <= 5.0.11

References

https://github.com/eclipse-vertx/vert.x/pull/6102Issue Tracking, Patch
https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-3g76-f9xq-8vp6Exploit, Vendor Advisory
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381Exploit, Issue Tracking, Third Party Advisory
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: May 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-6860?

How severe is CVE-2026-6860?

CVE-2026-6860 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2026-6860?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-6860?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST