CVE-2026-13502

MediumCVSS 4.5/10Last modified Oct 25, 2026

Description

A flaw has been found in antlr ANTLR4 up to 4.13.2. This affects the function ObjectInputStream.readObject of the file antlr4-maven-plugin/src/main/java/org/antlr/mojo/antlr4/GrammarDependencies.java of the component Maven Plugin. This manipulation causes time-of-check time-of-use. The attack is restricted to local execution. A high degree of complexity is needed for the attack. It is indicated that the exploitability is difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Metrics

CVSS 3.1 4.5/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness enumeration

CWE-362 CWE-367

Affected software

No affected versions have been published.

Timeline

Published: Jun 28, 2026
Last modified: Oct 25, 2026
NVD status: Deferred

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