CVE-2026-13500
HIGHantlr ANTLR4 Grammar Action Block OutputFile.java code injection
Title source: cnaDescription
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.
References (5)
Core 5
Core References
Vdb Entry vdb-entry
VDB-374495 | antlr ANTLR4 Grammar Action Block OutputFile.java code injection
https://vuldb.com/vuln/374495
Signature, Permissions Required signature
permissions-required
VDB-374495 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/vuln/374495/cti
Third Party Advisory third-party-advisory
CVE-2026-13500 | CVE Analysis and Report
https://vuldb.com/cve/CVE-2026-13500
Third Party Advisory third-party-advisory
Submit #838568 | antlr ANTLR4 4.13.2 Code Injection
https://vuldb.com/submit/838568
Exploit exploit
issue-tracking
https://github.com/wooyun123/wooyun/issues/4
Scores
CVSS v3
7.3
EPSS
0.0031
EPSS Percentile
23.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-74
CWE-94
Status
published
Products (3)
antlr/ANTLR4
4.13.0
antlr/ANTLR4
4.13.1
antlr/ANTLR4
4.13.2
Published
Jun 28, 2026
Tracked Since
Jun 28, 2026