Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/wooyun123/wooyun/issues/4
- https://vuldb.com/cve/CVE-2026-13500
- https://vuldb.com/submit/838568
- https://vuldb.com/vuln/374495
- https://vuldb.com/vuln/374495/cti
FAQ
What is CVE-2026-13500?
CVE-2026-13500 is a vulnerability with a CVSS score of 7.3 (HIGH). 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 Handl...
How severe is CVE-2026-13500?
CVE-2026-13500 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-13500?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.