{"id":"CLEANSTART-2026-KK56976","summary":"Improper encoding of non-finite floating-point values during MapMessage JSON serialization in Apache Log4j API produces output that is not valid JSON","details":"CVE-2026-49844 affects multiple packages. Improper encoding of non-finite floating-point values during MapMessage JSON serialization in Apache Log4j API produces output that is not valid JSON. See references for individual vulnerability details.","modified":"2026-10-01T03:00:08.974630586Z","published":"2026-10-01T00:35:38.593187Z","upstream":["CVE-2026-49844"],"database_specific":{},"references":[{"type":"ADVISORY","url":"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-KK56976.json"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-49844"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49844"}],"affected":[{"package":{"name":"elasticsearch","ecosystem":"CleanStart"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.3.8-r6"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-KK56976.json"}},{"package":{"name":"apache-nifi","ecosystem":"CleanStart"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.0-r1"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-KK56976.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}