{"id":"CVE-2026-116486","revision":"c4cf1ffd0c8a437fb644b77b948f401f","records":[{"revision":"c4cf1ffd0c8a437fb644b77b948f401f","observedAt":"2026-10-26T15:35:30.984+00:00","statement":{"source":"cve-program","id":"CVE-2026-116486","aliases":[],"title":"Objenesis before 3.6 Type Confusion via Class Name Instantiator Cache","description":"Objenesis before 3.6 contains a type confusion vulnerability that allows code in one class loader to substitute objects into another by exploiting instantiator caching keyed on class name. When a shared ObjenesisStd instance caches instantiators by clazz.getName() in ObjenesisBase.getInstantiatorOf(), same-named classes collide, causing newInstance() to return wrong-class objects and ClassCastException failures.","state":0,"publishedAt":"2026-10-26T13:08:52.051+00:00","modifiedAt":"2026-10-26T13:08:52.051+00:00","affected":[{"ecosystem":"Vendor product","name":"objenesis","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"easymock\",\n                    \"product\": \"objenesis\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:maven/org.objenesis/objenesis\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"3.6\"\n                        },\n                        {\n                            \"version\": \"3.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","score":2,"severity":"LOW"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","score":4.5,"severity":"MEDIUM"}],"references":["https://github.com/easymock/objenesis/commit/40f90f435a06b16af74a7398f0007faeaa52c00c","https://github.com/easymock/objenesis/security/advisories/GHSA-743r-26gf-97ff","https://github.com/easymock/objenesis/blob/fb36e5c377ed1bf57a18386fa79d2eed4ddfcfac/main/src/main/java/org/objenesis/ObjenesisBase.java#L92-L95","https://github.com/easymock/objenesis","https://www.vulncheck.com/advisories/objenesis-before-3.6-type-confusion-via-class-name-instantiator-cache"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116486","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116486","identifiers":["CVE-2026-116486"]},"retained":false,"historicalAffected":[]}],"coverage":[]}