Threats Tagged 'cve-2026-52737'
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Threats Tagged 'cve-2026-52737'
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GHSA-gvjc-3w7c-92jx: Zebra has sync restart poisoning from single unauthenticated peer via above-lookahead blockCVE-2026-52737 0 Zebra versions up to and including v4.4.1 are vulnerable to a sync restart poisoning attack via unauthenticated peers. A malicious peer can cause the node to repeatedly restart its sync process by sending blocks with a coinbase height far above the local tip, triggering a global sync restart delay of 67 seconds each time. This attack cancels all in-flight downloads from honest peers, significantly degrading sync progress without crashing or corrupting the node. The vulnerability is patched in Zebra 4.4.2, which improves error handling by banning offending peers and preventing global sync restarts. No configuration workaround exists; mitigation requires upgrading to the fixed version or maintaining a diverse honest peer set. Join the discussion | GCVE Database | 07/02/2026, 19:44:24 UTC Added: 07/02/2026, 22:56:54 UTC |
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