COINDESK · 2026-11-12 05:22 UTC

Bitcoin Core reveals bug that made thousands of nodes trust any stranger on Tor

Bitcoin Core published a security advisory on Tuesday, about 13 months after releasing a fix, disclosing three bugs patched in releases issued last October. A whitelist flaw treated incoming Tor connections as trusted when providers bundled Bitcoin Core with Tor, affecting thousands of reachable mainnet nodes that enabled the whitelist setting; the code change had been public on GitHub since September 2025. A high-severity bug could leave a mining node unable to build valid blocks until restarted, and a medium-severity bug let a malicious connection stall block processing for 10 minutes; the…

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