{"answers":{"affected":"3 open source packages ship an affected version, including xgrammar. It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-57809 in the wild and no public exploit code.","fix":"Upgrade xgrammar to 0.1.21 or later.","what":"CVE-2025-57809 is a high-severity vulnerability in mlc-ai xgrammar, published on 25 Aug 2025."},"fix_prompt":"Check this codebase for CVE-2025-57809 and fix it if it is affected.\n\nWhat it is: CVE-2025-57809 is a high-severity vulnerability in mlc-ai xgrammar, published on 25 Aug 2025. \nExploitation: There is no known exploitation of CVE-2025-57809 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- xgrammar (PyPI): affected all versions; fixed in 0.1.21\n- xgrammar (PyPI): affected all versions; fixed in 0.1.21\n- xgrammar (PyPI): affected all versions; fixed in 0.1.21\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-2025-57809/ (Markdown: https://insights.sbomify.com/CVE-2025-57809/index.md)","id":"CVE-2025-57809","markdown":"https://insights.sbomify.com/CVE-2025-57809/index.md","name":"CVE-2025-57809","record":{"aliases":["GHSA-5cmr-4px5-23pc","PYSEC-2026-2054"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[{"product":"xgrammar","vendor":"mlc-ai"}],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-674","name":"Uncontrolled Recursion"}],"description":"XGrammar is an open-source library for efficient, flexible, and portable structured generation. Prior to version 0.1.21, XGrammar has an infinite recursion issue in the grammar. This issue has been resolved in version 0.1.21.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"XGrammar affected by Denial of Service by infinite recursion grammars","id":"CVE-2025-57809","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2025"},"n_packages":3,"n_references":3,"next":{"headline":"jsPDF Parsing of Corrupt PNGs Leads to Potential Denial of Service (DoS)","id":"CVE-2025-57810"},"packages":[{"ecosystem":"PyPI","fixed":["0.1.21"],"introduced":["0"],"last_affected":[],"package":"xgrammar","purl":null,"source":"GHSA-5cmr-4px5-23pc"},{"ecosystem":"PyPI","fixed":["0.1.21"],"introduced":["0"],"last_affected":[],"package":"xgrammar","purl":"pkg:pypi/xgrammar","source":"GHSA-5cmr-4px5-23pc"},{"ecosystem":"PyPI","fixed":["0.1.21"],"introduced":["0"],"last_affected":[],"package":"xgrammar","purl":"pkg:pypi/xgrammar","source":"PYSEC-2026-2054"}],"prev":{"headline":"ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header","id":"CVE-2025-57808"},"products":["xgrammar"],"published":"2025-08-25","related":[{"cvss_score":8.7,"headline":"xgrammar: Multi-layer nesting causes DoS","id":"CVE-2026-25048","kev_date_added":null,"published":"2026-03-05"},{"cvss_score":6.9,"headline":"xgrammar vulnerable to denial of service by huge enum grammar","id":"CVE-2025-58446","kev_date_added":null,"published":"2025-09-06"},{"cvss_score":6.5,"headline":"Denial of Service by abusing xgrammar unbounded cache in memory","id":"CVE-2025-32381","kev_date_added":null,"published":"2025-04-09"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-08-26","vendors":["mlc-ai"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2025-57809/"}