{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13500 exists.","fix":"No fix has been published for CVE-2026-13500 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-13500 is a medium-severity code injection vulnerability in ANTLR4, published on 28 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-13500 and fix it if it is affected.\n\nWhat it is: CVE-2026-13500 is a medium-severity code injection vulnerability in ANTLR4, published on 28 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13500 exists.\n\nAffected product: ANTLR4. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-13500/ (Markdown: https://insights.sbomify.com/CVE-2026-13500/index.md)","id":"CVE-2026-13500","markdown":"https://insights.sbomify.com/CVE-2026-13500/index.md","name":"CVE-2026-13500","record":{"aliases":["DEBIAN-CVE-2026-13500","GHSA-m64j-m5c8-f58p","UBUNTU-CVE-2026-13500"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"ANTLR4 parser generator","requires_auth":"none","summary":"Remote attackers can execute arbitrary code via manipulated grammar action blocks in the ANTLR4 parser generator library.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"},{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"antlr ANTLR4 Grammar Action Block OutputFile.java code injection","id":"CVE-2026-13500","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"antlr ANTLR4 gofmt GoTarget.java GoTarget command injection","id":"CVE-2026-13501"},"packages":[],"prev":{"headline":"yashpokharna2555 restaurent-management-system Registration login_register.php cross site scripting","id":"CVE-2026-13499"},"products":["ANTLR4"],"published":"2026-06-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-29","vendors":["antlr"]},"summary":"Remote attackers can execute arbitrary code via manipulated grammar action blocks in the ANTLR4 parser generator library.","url":"https://insights.sbomify.com/CVE-2026-13500/"}