Zcash, before the Sapling network upgrade (2018-10-28), had a counterfeiting…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
Zcash, before the Sapling network upgrade (2018-10-28), had a counterfeiting vulnerability. A key-generation process, during evaluation of polynomials related to a to-be-proven statement, produced certain bypass elements. Availability of these elements allowed a cheating prover to bypass a consistency check, and consequently transform the proof of one statement into an ostensibly valid proof of a different statement, thereby breaking the soundness of the proof system. This misled the original Sprout zk-SNARK verifier into accepting the correctness of a transaction.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-7167
- 2026-10-03 Alias added: GHSA-q567-c5xf-8xjf
References
More Zcash vulnerabilities
- TI-2019-08706 Zcash 2.x allows an inexpensive approach to "fill all transactions of all blocks" and… CVSS 3.0HIGH 7.5
- TI-2019-12629 Zcashd in Zcash before 2.0.7-3 allows discovery of the IP address of a full node that… CVSS 3.1MEDIUM 5.3
Sources
- CVE-2019-7167 · CVE Program
- CVE-2019-7167 · NVD
- FIRST EPSS
- GHSA-q567-c5xf-8xjf · GitHub Advisory Database · CC BY 4.0
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