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VulnerabilityPublished

CVE-2026-35679: Zcash zcashd · Improperly Implemented Security Check for Standard

Affects Zcash zcashdSource CVE Database V5

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Not known to be exploited · CVSS 3.5 Low : upgrade to 6.12.0 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
3.5Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 6.12.0
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade zcashd and zcash/zcash to 6.12.0.

Affected software

ProductAffectedFixed in
ZcashzcashdAffected
  • <6.12.0
Fixed in
  • 6.12.0
GitHubzcash/zcashpkg:github/zcash/zcashOther threatsAffected
  • <6.12.0
Fixed in
  • 6.12.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

No specific mitigations are provided in the available data.

Description

A vulnerability in Zcash zcashd versions before 6.12.0 allows acceptance of invalid transactions due to improper verification of Sprout proofs. This flaw could potentially lead to the draining of user funds from the Sprout pool. The issue is classified as CWE-358, indicating an improperly implemented security check. The CVSS score is 3.5, reflecting a low severity with limited impact and exploitation complexity. There are no known exploits in the wild at this time.

References

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