{"id":"CVE-2019-11636","details":"Zcash 2.x allows an inexpensive approach to \"fill all transactions of all blocks\" and \"prevent any real transaction from occurring\" via a \"Sapling Wood-Chipper\" attack.","modified":"2026-04-11T18:10:43.196581Z","published":"2019-05-01T17:29:00.230Z","references":[{"type":"WEB","url":"https://saplingwoodchipper.github.io"},{"type":"ADVISORY","url":"https://github.com/zcash/zcash/issues/3955"},{"type":"ADVISORY","url":"https://twitter.com/dukeleto/status/1120467430118232066"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zcash/zcash","events":[{"introduced":"d960b75de02097c806afb1a2d4982a5f85caf4e1"},{"last_affected":"be1d68ef763ce405d4d04d7f4d3dfbbdd9084687"},{"introduced":"0"},{"last_affected":"910b1ea2ad4edf8b1442ee8e85af4adc2fbfc4e8"}],"database_specific":{"cpe":["cpe:2.3:a:z.cash:zcash:*:*:*:*:*:*:*:*","cpe:2.3:a:z.cash:zcash:2.0.5:rc1:*:*:*:*:*:*"],"extracted_events":[{"introduced":"2.0.0"},{"last_affected":"2.0.4"},{"introduced":"0"},{"last_affected":"2.0.5-rc1"}],"source":"CPE_FIELD"}}],"versions":["v2.0.0","v2.0.1","v2.0.1-rc1","v2.0.2","v2.0.2-rc1","v2.0.3","v2.0.3-rc1","v2.0.4","v2.0.4-rc1","v2.0.5-rc1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-11636.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}