Resource exhaustion in Eclipse Vert.x
CVE-2026-6860
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (21.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Eclipse Vert.x
- Eclipse Foundation Vert.x — versions 4.3.4, 5.0.0
Weakness classification (CWE)
References
- gitlab.eclipse.org/security/vulnerability-reports/-/issues/381 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/eclipse-vertx/vert.x/security/advisories/GHSA-3g76-f9xq-8vp6 (Exploit, Vendor Advisory)
- github.com/eclipse-vertx/vert.x/pull/6102 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-6860?
- CVE-2026-6860 is a medium-severity vulnerability in Eclipse Vert.x, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-05-06.
- How severe is CVE-2026-6860?
- Medium severity. CVSS v3 base score is 5.3 out of 10.