CVE-2026-6860
Apache TLS Server Name Spoofing Vulnerability
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.
INFO
Published Date :
May 6, 2026, 10:16 a.m.
Last Modified :
May 12, 2026, 1:42 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | e51fbebd-6053-4e49-959f-1b94eeb69a2c | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Configure server to disable wildcard certificate matching.
- Ensure certificate subject alternative names are specific.
- Avoid using wildcard certificates where possible.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-6860.
| URL | Resource |
|---|---|
| https://github.com/eclipse-vertx/vert.x/pull/6102 | Issue Tracking Patch |
| https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-3g76-f9xq-8vp6 | Vendor Advisory Exploit |
| https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381 | Exploit Issue Tracking Third Party Advisory |
| https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381 | Exploit Issue Tracking Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-6860 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-6860
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-6860 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-6860 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 12, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-770 Added CPE Configuration OR *cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:* versions from (including) 4.3.4 up to (including) 4.5.26 *cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:* versions from (including) 5.0.0 up to (including) 5.0.11 Added Reference Type Eclipse Foundation: https://github.com/eclipse-vertx/vert.x/pull/6102 Types: Issue Tracking, Patch Added Reference Type Eclipse Foundation: https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-3g76-f9xq-8vp6 Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381 Types: Exploit, Issue Tracking, Third Party Advisory Added Reference Type Eclipse Foundation: https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381 Types: Exploit, Issue Tracking, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 12, 2026
Action Type Old Value New Value Added CWE CWE-295 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 06, 2026
Action Type Old Value New Value Added Reference https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381 -
New CVE Received by [email protected]
May. 06, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 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 Added Reference https://github.com/eclipse-vertx/vert.x/pull/6102 Added Reference https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-3g76-f9xq-8vp6 Added Reference https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381