CVE-2018-12544

Moderate severity vulnerability that affects io.vertx:vertx-core

9.8 CriticalFix available

In 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 XML attacks. This mechanism is exclusively when the developer uses the Eclipse Vert.x OpenAPI XML type validator to validate a provided schema.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.17%Up 1.1 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2018-12544
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-611
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-12544
Weakness: CWE-611
Updated: 2026-11-02

EUVDEUVD-2018-0664 No score

Record: EUVD-2018-0664
Updated: 2026-11-03

GitHub AdvisoriesGHSA-qh3m-qw6v-qvhg No score

Moderate severity vulnerability that affects io.vertx:vertx-core

Record: GHSA-qh3m-qw6v-qvhg
Weakness: CWE-611
Updated: 2026-11-02

OSV 9.8

Record: CVE-2018-12544
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-qh3m-qw6v-qvhg No score

Moderate severity vulnerability that affects io.vertx:vertx-core

Record: GHSA-qh3m-qw6v-qvhg
Weakness: CWE-611
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`io.vertx:vertx-core` Maven	3.5.0 up to 3.5.4	3.5.4
`io.vertx:vertx-core` Maven	3.5.0 up to 3.5.4, plus listed versions 3.5.13.5.23.5.2.CR13.5.2.CR23.5.2.CR33.5.33.5.3.CR1	3.5.4

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-12544 is a critical vulnerability (CVSS 9.8) in Eclipse Vert.x, published October 10, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.17%, the 82nd percentile. Fixed in io.vertx:vertx-core 3.5.4.