CVE-2026-102461

MediumCVSS 5.9/10Last modified Oct 20, 2026

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 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-407

Affected software

No affected versions have been published.

Timeline

Published
Oct 15, 2026
Last modified
Oct 20, 2026
NVD status
Analyzed

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CVE-2026-102461: Medium severity, CVSS 5.9 | Vulnix