CVE-2026-13503

antlr ANTLR4 tokenVocab Grammar Option TokenVocabParser.java getImportedVocabFile path traversal

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.

Affected

antlr · ANTLR4

CVSS v4.0 VULDB

5.5 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULDB

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v2.0 VULDB

5.0 MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

EPSS

0.77% chance of exploitation in the next 30 days, 55th percentile

Published

2026-06-28

Updated

2026-06-29

Proof-of-concept exploits (1)

• wooyun123/wooyun/issues/80★ · 2025-09-04

References

• CVE Record
• NVD entry

Related

• CVE-2025-10765
• CVE-2026-13500
• CVE-2026-13501
• CVE-2026-13502