Medium 5.3Published Jun 28, 2026

CVE-2026-13503antlr ANTLR4 tokenVocab Grammar Option TokenVocabParser.java getImportedVocabFile path traversal

Updated under an hour ago (Oct 26, 2026, 1:10 PM ET)

Does this affect you?

It affects ANTLR4. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for ANTLR4

Exploited in the last 30 days

A vulnerability was detected in antlr ANTLR4 up to 4.13.2. Affected by this issue is the function getImportedVocabFile of the file tool/src/org/antlr/v4/parse/TokenVocabParser.java of the component tokenVocab Grammar Option Handler. The manipulation results in path traversal. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Jun 29, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

antlr ANTLR4 antlr:antlr4	4.13.0; 4.13.1; 4.13.2	CNA record

References

References

https://vuldb.com/vuln/374497	vdb-entry, technical-description
https://vuldb.com/vuln/374497/cti	signature, permissions-required
https://vuldb.com/cve/CVE-2026-13503	third-party-advisory
https://vuldb.com/submit/838686	third-party-advisory
https://github.com/wooyun123/wooyun/issues/8	exploit, issue-tracking

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.