Input validation error in Zcash - #VU138509
Published: July 20, 2026
Vulnerability identifier: #VU138509
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within malformed P2P tx/block messages. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Affected software
Zcash
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.