{"id":"CVE-2026-13500","state":"PUBLISHED","title":"antlr ANTLR4 Grammar Action Block OutputFile.java code injection","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.","publishedAt":"2026-06-28T14:15:07.499Z","updatedAt":"2026-06-29T12:37:01.600Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","source":"VulDB"},"assigner":"VulDB","products":["antlr ANTLR4"],"affected":[{"vendor":"antlr","product":"ANTLR4","versions":[{"version":"4.13.0","status":"affected"},{"version":"4.13.1","status":"affected"},{"version":"4.13.2","status":"affected"}],"cpes":["cpe:2.3:a:antlr:antlr4:*:*:*:*:*:*:*:*"],"modules":["Grammar Action Block Handler"]}],"references":["https://vuldb.com/vuln/374495","https://vuldb.com/vuln/374495/cti","https://vuldb.com/cve/CVE-2026-13500","https://vuldb.com/submit/838568","https://github.com/wooyun123/wooyun/issues/4"],"weaknesses":["CWE-94","CWE-74"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/13xxx/CVE-2026-13500.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-13500","state":"PUBLISHED","datePublished":"2026-06-28T14:15:07.499Z","dateUpdated":"2026-06-29T12:37:01.600Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-06-27T18:27:58.576Z"},"containers":{"cna":{"title":"antlr ANTLR4 Grammar Action Block OutputFile.java code injection","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"antlr","product":"ANTLR4","versions":[{"version":"4.13.0","status":"affected"},{"version":"4.13.1","status":"affected"},{"version":"4.13.2","status":"affected"}],"cpes":["cpe:2.3:a:antlr:antlr4:*:*:*:*:*:*:*:*"],"modules":["Grammar Action Block Handler"]}],"references":[{"url":"https://vuldb.com/vuln/374495","name":"VDB-374495 | antlr ANTLR4 Grammar Action Block OutputFile.java code injection","tags":["vdb-entry"]},{"url":"https://vuldb.com/vuln/374495/cti","name":"VDB-374495 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-13500","name":"CVE-2026-13500 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/838568","name":"Submit #838568 | antlr ANTLR4 4.13.2 Code Injection","tags":["third-party-advisory"]},{"url":"https://github.com/wooyun123/wooyun/issues/4","tags":["exploit","issue-tracking"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":6.9,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":7.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","baseSeverity":"HIGH"}},{"cvssV3_0":{"version":"3.0","baseScore":7.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","baseSeverity":"HIGH"}},{"cvssV2_0":{"version":"2.0","baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-94","type":"CWE","lang":"en","description":"Code Injection"}]},{"descriptions":[{"cweId":"CWE-74","type":"CWE","lang":"en","description":"Injection"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-06-28T14:15:07.499Z"},"timeline":[{"time":"2026-06-27T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-06-27T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-06-27T20:33:12.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"jiazhou (VulDB User)","type":"reporter"},{"lang":"en","value":"VulDB CNA Team","type":"coordinator"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-29T12:36:50.191025Z","id":"CVE-2026-13500","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-29T12:37:01.600Z"}}]}}}