CVE-2026-104427
Zebra before 6.1.0 Chain Stall via Stale parent_error_map Entry
- State
- Published
- Severity
- 8.2 High
- Published
- Oct 2, 2026
- Updated
- Oct 5, 2026
- Reserved
- Oct 2, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-459 Incomplete Cleanup
Affected Products
| Product | Versions |
|---|---|
zebraZcashFoundation |
|
References
- GitHub Security Advisory (GHSA-8gxx-hc65-vv82)vendor-advisory
- VulnCheck Advisory: Zebra before 6.1.0 Chain Stall via Stale parent_error_map Entrythird-party-advisory
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