{"action":"Upgrade org.apache.opennlp:opennlp-tools to 1.9.5 (1.x), 2.5.9 (2.x) or 3.0.0-M3 (3.x) or later.","affected":[{"fixed":"2.5.9","introduced":"2.0.0"},{"fixed":"3.0.0-M3","introduced":"3.0.0-M1"},{"fixed":"1.9.5","introduced":"0"}],"component":"org.apache.opennlp:opennlp-tools","cve_ids":["CVE-2026-42027"],"ecosystem":"Maven","epss":0.00707,"exploited":false,"fixed_versions":["2.5.9","3.0.0-M3","1.9.5"],"ghsa_id":"GHSA-cx4m-2p55-rw7j","id":"tcs_01M5N8TJENFSX03XTAY13S5JP5","modified_at":"2026-09-09T15:45:11.338096731Z","published_at":"2026-05-04T18:30:31Z","references":["https://osv.dev/vulnerability/GHSA-cx4m-2p55-rw7j","https://nvd.nist.gov/vuln/detail/CVE-2026-42027","https://access.redhat.com/errata/RHSA-2026:65126","https://access.redhat.com/security/cve/CVE-2026-42027","https://bugzilla.redhat.com/show_bug.cgi?id=2466527","https://github.com/apache/opennlp","https://lists.apache.org/thread/ltlo4powjfc0w2w2yyl1o5tc7q1gcb2y","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42027.json","http://www.openwall.com/lists/oss-security/2026/05/01/20"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"GHSA-cx4m-2p55-rw7j","url":"https://osv.dev/vulnerability/GHSA-cx4m-2p55-rw7j"}],"summary":"Apache OpenNLP ExtensionLoader Vulnerable to Arbitrary Class Instantiation via Model Manifest"}