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Vulnerability record · CVE-2026-6860 · published 6 May 2026

CVE-2026-6860: Eclipse vert.x allocation without limits vulnerability

Eclipse · Vert.X

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.

6.9 CVSS 4.0 Medium EPSS 0.31% · top 78.5% CWE-770 · Allocation without limitsCWE-295 · Improper certificate validation
6.9CVSS 4.0 base score
0.31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 3 tagged exploit
17 Jun 2026Last modified by NVD

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.

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/eclipse-vertx/vert.x/pull/6102 Issue TrackingPatch
https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-3g76-f9xq-8vp6 ExploitVendor Advisory
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381 ExploitIssue TrackingThird Party Advisory
https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/381 ExploitIssue TrackingThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-17640Eclipse vert.x relative path traversal vulnerabilityIn Eclipse Vert.x 3.4.x up to 3.9.4, 4.0.0.milestone1, 4.0.0.milestone2, 4.0.0.milestone3, 4.0.0.milestone4, 4.0.0.milestone5, 4.0.0.Beta1, 4.0.0.Bet…EPSS 2.0%9.8CVE-2018-12542Eclipse vert.x path traversal vulnerabilityIn version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the StaticHandler uses external input to construct a pathname that should be within a restricted di…EPSS 2.2%9.8CVE-2018-12544Eclipse vert.x xml external entity (xxe) vulnerabilityIn version from 3.5.Beta1 to 3.5.3 of Eclipse Vert.x, the OpenAPI XML type validator creates XML parsers without taking appropriate defense against X…EPSS 2.2%8.8CVE-2018-12540Eclipse vert.x cross-site request forgery vulnerabilityIn version from 3.0.0 to 3.5.2 of Eclipse Vert.x, the CSRFHandler do not assert that the XSRF Cookie matches the returned XSRF header/form parameter.…EPSS 2.0%8.2CVE-2026-15075Eclipse vert.x information exposure vulnerabilityIn Eclipse Vert.x versions up to and including 4.5.29 (4.x branch) and 5.1.4 (5.x branch), DefaultRedirectHandler (vertx-core) propagates all request…EPSS 0.20%8.2CVE-2026-15076Eclipse vert.x origin validation error vulnerabilityIn versions up to and including 4.5.29 (4.x branch) and 5.1.4 (5.x branch), the WebClientSession component of Eclipse Vert.x Web Client does not vali…EPSS 0.20%6.9CVE-2024-8391Eclipse vert.x allocation without limits vulnerabilityIn Eclipse Vert.x version 4.3.0 to 4.5.9, the gRPC server does not limit the maximum length of message payload (Maven GAV: io.vertx:vertx-grpc-server…EPSS 0.58%6.5CVE-2018-12541Eclipse vert.x memory buffer overflow vulnerabilityIn version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the WebSocket HTTP upgrade implementation buffers the full http request before doing the handshake,…EPSS 2.7%

Source: NIST National Vulnerability Database (record CVE-2026-6860), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.