Command Injection Vulnerability in antlr ANTLR4 Tool by antlr
CVE-2026-13501

4.8MEDIUM

Key Information:

Vendor

Antlr

Status
Antlr4
Vendor
CVE Published:
28 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13501?

A security vulnerability has been identified in the antlr ANTLR4 tool, specifically within the GoTarget function found in the GoTarget.java file. This vulnerability is categorized as a command injection risk, allowing an attacker to execute arbitrary commands on the host system. The attack must originate from a local environment, making its potential for exploitation dependent on user's access. Despite notifications sent to the vendor regarding this issue, there has been no response or patch made public at this time.

Affected Version(s)

ANTLR4 4.13.0

ANTLR4 4.13.1

ANTLR4 4.13.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-13501 - Proof of Concept

References

https://vuldb.com/vuln/374496
vdb-entrytechnical-description
https://vuldb.com/vuln/374496/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13501
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

jiazhou (VulDB User)
VulDB CNA Team
.