CVE-2026-123560
Published:November 08, 2026
Updated:November 09, 2026
Zebra before 7.0.0 contains an incomplete cleanup vulnerability that allows unauthenticated peers to stall initial sync by serving a forged checkpoint block body. Attackers can supply a body with forged authorizing data near the final checkpoint, leaving rejected hashes in the sent-hash set so the node stops requesting blocks until restart.
Affected Packages
https://github.com/ZcashFoundation/zebra.git (GITHUB):
Affected version(s) >=v4.1.0 <v7.0.0 || >=v5.0.0 <v7.0.0 || >=v6.0.0-rc.0 <v7.0.0 || =v7.0.0-rc.0 <v7.0.0Fix Suggestion:
Update to version v7.0.0zebra-state (RUST):
Affected version(s) =15.0.0 <16.0.0 || =4.0.0 <16.0.0 || >=12.0.0 <16.0.0 || >=11.0.0 <16.0.0 || =5.0.0 <16.0.0 || >=9.0.0 <16.0.0 || =6.0.0 <16.0.0 || =8.0.0 <16.0.0 || =14.0.0 <16.0.0 || =7.0.0 <16.0.0 || =13.0.0 <16.0.0 || >=10.0.0 <16.0.0Fix Suggestion:
Update to version 16.0.0Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Incomplete Cleanup
EPSS
Base Score:
0.34