{"id":"CVE-2019-11636","aliases":["EUVD-2019-3306","GHSA-p5ww-mxg5-8q8m"],"status":"published","title":"Zcash 2.x allows an inexpensive approach to \"fill all transactions of all blocks\" and \"prevent...","description":"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.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0218,"percentile":0.82485,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-254"],"published":"2019-05-01T16:21:33Z","modified":"2026-10-20T10:52:19Z","products":[{"vendor":"z.cash","product":"zcash"}],"references":[{"url":"https://github.com/zcash/zcash/issues/3955","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://twitter.com/dukeleto/status/1120467430118232066","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://saplingwoodchipper.github.io","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-11636"},{"url":"https://github.com/advisories/GHSA-p5ww-mxg5-8q8m"}],"sources":{"cve":[{"id":"CVE-2019-11636","description":"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.","status":"published","published":"2019-05-01T16:21:33Z","modified":"2024-08-04T22:55:41.119Z","updated_at":"2026-11-02T14:20:26.416173Z"}],"euvd":[{"id":"EUVD-2019-3306","description":"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.","status":"published","published":"2019-05-01T16:21:33Z","modified":"2024-08-04T22:55:41Z","updated_at":"2026-11-03T02:40:48.505669Z"}],"ghsa":[{"id":"GHSA-p5ww-mxg5-8q8m","title":"Zcash 2.x allows an inexpensive approach to \"fill all transactions of all blocks\" and \"prevent...","description":"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.","status":"published","published":"2022-05-24T16:45:01Z","modified":"2024-04-04T00:25:07Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T14:55:50.017793Z"}],"nvd":[{"id":"CVE-2019-11636","description":"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.","status":"published","published":"2019-05-01T17:29:00.23Z","modified":"2026-06-17T02:13:19.163Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-254"],"updated_at":"2026-11-02T14:05:12.471695Z"}],"osv":[{"id":"CVE-2019-11636","description":"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.","status":"published","published":"2019-05-01T17:29:00.23Z","modified":"2026-10-20T10:52:19.159682081Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:10.718934Z"}]}}