CVE-2026-13500

highCVSS 7.3covered by 1 sourcefirst seen 2026-06-28

A weakness has been identified in antlr ANTLR4 up to 4.13.2. Affected is an unknown function of the file tool/src/org/antlr/v4/codegen/model/OutputFile.java of the component Grammar Action Block Handler. Executing a manipulation can lead to code injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

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Exploitation outlook

Low exploitation risk0.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-13500: A weakness has been identified in antlr ANTLR4 up to 4.13.2. Affected is an unknown function o…nvd · 2026-06-28

External references

NVD record for CVE-2026-13500

CVE.org record

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