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CVE-2026-102461 Details

Description

In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the uniqueItems keyword validation uses an O(n²) pairwise comparison loop with no short-circuit or size limit. A remote unauthenticated attacker can submit a moderately-sized JSON array that consumes disproportionate CPU time, leading to denial of service. The impacted component is io.vertx:vertx-json-schema. The following Vert.x modules depend on vertx-json-schema and are also affected: io.vertx:vertx-web-openapi-router io.vertx:vertx-web-validation io.vertx:vertx-openapi

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.9 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/eclipse-vertx/vertx-json-schema/security/advisories/GHSA-4m87-8qfr-8p8m	[email protected]	Vendor Advisory
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/340	[email protected]	Issue TrackingThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-407	Inefficient Algorithmic Complexity	CISA-ADP

Affected Products

Product	Versions
eclipse vert.x	>= 4.5.0, < 4.5.35 >= 5.0.0, < 5.1.10 5.2.0
CPE cpe:2.3:a:eclipse:vert.x:::::::: cpe:2.3:a:eclipse:vert.x:5.2.0:::::::* Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 20, 2026	Initial Analysis	[email protected]
Oct 16, 2026	CVE Modified	CISA-ADP
Oct 15, 2026	New CVE Received	[email protected]