CVE-2026-13503

MEDIUM 5.3

antlr ANTLR4 tokenVocab Grammar Option TokenVocabParser.java getImportedVocabFile path traversal

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	antlr
Product	antlr4
Published	Jun 28, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

antlr / ANTLR4

4.13.0 4.13.1 4.13.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/374497 vuldb.com: https://vuldb.com/vuln/374497/cti vuldb.com: https://vuldb.com/cve/CVE-2026-13503 vuldb.com: https://vuldb.com/submit/838686 github.com: https://github.com/wooyun123/wooyun/issues/8

Credits

🔍 jiazhou (VulDB User) VulDB CNA Team