{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13503 exists.","fix":"No fix published yet.","what":"CVE-2026-13503 is a medium-severity path traversal 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-2026-13503 and fix it if it is affected.\n\nWhat it is: CVE-2026-13503 is a medium-severity path traversal 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-2026-13503 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-2026-13503/ (Markdown: https://insights.sbomify.com/CVE-2026-13503/index.md)","id":"CVE-2026-13503","markdown":"https://insights.sbomify.com/CVE-2026-13503/index.md","name":"CVE-2026-13503","record":{"aliases":["CLSA-2026-1791472866","CLSA-2026-1791480304","CLSA-2026-1793128354","CLSA-2026-1793128545","DEBIAN-CVE-2026-13503","GHSA-w346-wxvq-p3xr","MGASA-2026-0488","UBUNTU-CVE-2026-13503"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"ANTLR4 parser generator","requires_auth":"none","summary":"Remote attackers can exploit a path traversal flaw in ANTLR4's tokenVocab handler to read arbitrary files from the system.","user_interaction":"not_required","vuln_class":"path_traversal"},"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:N/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"A vulnerability was detected in antlr ANTLR4 up to 4.13.2. Affected by this issue is the function getImportedVocabFile of the file tool/src/org/antlr/v4/parse/TokenVocabParser.java of the component tokenVocab Grammar Option Handler. The manipulation results in path traversal. The attack can be executed remotely. The exploit is now public and may be used. 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":true,"headline":"antlr ANTLR4 tokenVocab Grammar Option TokenVocabParser.java getImportedVocabFile path traversal","id":"CVE-2026-13503","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"code-projects Project Management System Mail Compose mail.php cross site scripting","id":"CVE-2026-13504"},"packages":[],"prev":{"headline":"antlr ANTLR4 Maven Plugin GrammarDependencies.java ObjectInputStream.readObject toctou","id":"CVE-2026-13502"},"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 exploit a path traversal flaw in ANTLR4's tokenVocab handler to read arbitrary files from the system.","url":"https://insights.sbomify.com/CVE-2026-13503/"}