CVE-2019-11636

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 65.8%
KEV: Not listed

Published

May 1, 2019

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://github.com/zcash/zcash/issues/3955
cve@mitrehttps://saplingwoodchipper.github.io
cve@mitrehttps://twitter.com/dukeleto/status/1120467430118232066
af854a3a-2127-422b-91ae-364da2661108https://github.com/zcash/zcash/issues/3955
af854a3a-2127-422b-91ae-364da2661108https://saplingwoodchipper.github.io
af854a3a-2127-422b-91ae-364da2661108https://twitter.com/dukeleto/status/1120467430118232066

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-254

Data Freshness Timeline

(refreshed 9× in last 7d / 16× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 02:56 UTCEG score recompute
2026-05-23 02:56 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2019-11636?

CVE-2019-11636 is a high vulnerability published on May 1, 2019. 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.

When was CVE-2019-11636 disclosed?

CVE-2019-11636 was first published in the National Vulnerability Database on May 1, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-11636 actively exploited?

CVE-2019-11636 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 65.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-11636?

CVE-2019-11636 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2019-11636?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-11636, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2019-11636

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-11636?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)