{"schema":"threatline.record/2","record":{"id":"CVE-2026-71253","aliases":[],"summary":"Apache Johnzon: ClassConverter loads & static-initializes an attacker-named class from untrusted JSON","details":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\n\n\nClassConverter loads & static-initializes an attacker-named class from untrusted JSON.\n\n\n\n\nThis issue affects Apache Johnzon: from 1.0.0 before 2.2.0.\n\n\n\nUsers are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.","categories":["Unclassified"],"product":"Apache Johnzon","vendor":"Apache Software Foundation","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-71253","source_modified_at":"2026-10-20T19:34:25.835Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Apache Johnzon","vendor":"Apache Software Foundation","versions":[{"status":"affected","version":"2.0.0","lessThan":"2.2.0","versionType":"semver"},{"status":"affected","version":"1.0.0","lessThan":"1.3.1","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-71253","source_modified_at":"2026-10-20T19:34:25.835Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Apache Johnzon","ecosystem":null},"version":"2.2.0","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-71253","source_modified_at":"2026-10-20T19:34:25.835Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Apache Johnzon","ecosystem":null},"version":"1.3.1","basis":"first unaffected version stated in the CVE record"}],"cvss":9.8,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00654,"percentile":0.5072,"score_date":"2026-10-23"},"published_at":"2026-10-19T10:36:41.781Z","modified_at":"2026-10-20T19:34:25.835Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-71253","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-20T19:34:25.835Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-71253","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/apache/johnzon/commit/dd3d00634c746a2173a2518e882e85e8a151bf30","tags":["patch"]},{"source":"CVE List","url":"https://github.com/apache/johnzon/commit/91e7b0d21d08d138944e2570691939739422a3d6","tags":["patch"]},{"source":"CVE List","url":"https://lists.apache.org/thread.html/3vgm1yo2sn9yhkvvs9lc4ro01vl3zt68","tags":["vendor-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"total","assessed_at":"2026-10-20T19:34:08.742206Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-20T19:34:25.835Z","content_hash":"119bd941afa883ae268189e800467163e583223fe3c85f8cd86582524d05d0e2"}}