CVE-2026-13503

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 4.0

5.5CVSS: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

CVSS 3.1

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

EPSS

0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-25)

CWE

CWE-22

Published

2026-06-28

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

References

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

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