CVE-2026-104427
Zebra before 6.1.0 Chain Stall via Stale parent_error_map Entry
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
Zebra before 6.1.0 contains an incomplete cleanup vulnerability in the state write task that allows remote unauthenticated peers to stall node synchronization by poisoning parent_error_map. Attackers can deliver a coinbase-malleated block sharing a canonical block's hash before it propagates, causing the next canonical block to be rejected and stalling the node for roughly 2,000 blocks.
| CWE | CWE-459 |
| Vendor | zcashfoundation |
| Product | zebra |
| Published | Oct 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
ZcashFoundation / zebra
0 < 6.1.0
References
Credits
🔍 deedim jvff upbqdn