CVE-2026-13503

mediumCVSS 5.3covered by 1 sourcefirst seen 2026-06-28

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.

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Exploitation outlook

Low exploitation risk0.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-13503: A vulnerability was detected in antlr ANTLR4 up to 4.13.2. Affected by this issue is the funct…nvd · 2026-06-28

External references

NVD record for CVE-2026-13503

CVE.org record

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