Improper control of a resource through its lifetime in Zcash - #VU130978
Published: May 11, 2026
Vulnerability identifier: #VU130978
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-664
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Zcash
Zcash
Software vendor:
Electric Coin Co.
Electric Coin Co.
Description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper state management in zcashd block ingestion when processing a poisoned NU5+ block body before the canonical body. A remote attacker can send a specially crafted block body with mutated V5 transaction authorizing data to cause a denial of service.
Successful exploitation requires winning a P2P delivery race for a newly mined NU5+ block, and the targeted node can remain stalled on a stale chain tip until manual recovery.
Remediation
Install security update from vendor's website.