What is CVE-2026-13501?

CVE-2026-13501 is a medium-severity vulnerability in Antlr Antlr4, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 5.3/10. Published 2026-06-28.

How severe is CVE-2026-13501?

Medium severity. CVSS v3 base score is 5.3 out of 10.

RCE in Antlr Antlr4

CVE-2026-13501

A security vulnerability has been detected in antlr ANTLR4 up to 4.13.2. Affected by this vulnerability is the function GoTarget of the file tool/src/org/antlr/v4/codegen/target/GoTarget.java of the component gofmt. The manipulation leads…

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Antlr Antlr4 — versions 4.13.0, 4.13.1, 4.13.2

Weakness classification (CWE)

References

cna@vuldb.com (issue-tracking, exploit)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)

Frequently asked questions

What is CVE-2026-13501?: CVE-2026-13501 is a medium-severity vulnerability in Antlr Antlr4, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 5.3/10. Published 2026-06-28.
How severe is CVE-2026-13501?: Medium severity. CVSS v3 base score is 5.3 out of 10.