CVE-2026-13500: ANTLR4 4.13.0, 4.13.1, 4.13.2

CVE-2026-13500. CVSS 3.1 base score 7.3 (HIGH, Vendor/CNA). EPSS 0.00516 (percentile 0.43145), scored 24-Oct-2026.

Affected technology

ANTLR4 · 4.13.0, 4.13.1, 4.13.2
antlr

Description’s affected range: up to 4.13.2

Component: Grammar Action Block Handler
Function: of
File: tool/src/org/antlr/v4/codegen/model/OutputFile.java

Attack conditions (VulDB, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

VulDB’s CVSS 4.0 assessment (base score 5.5/10) rates confidentiality, integrity and availability impact as low. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 25-Oct-2026 19:52 UTC

CWE: CWE-74, CWE-94
CCR priority: 29.3 /100 (P4)
CVSS 3.1: 7.3 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L · Vendor/CNA
EPSS: 0.00516 · percentile 0.43672 · 2026-10-25
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-13500.html