CVE-2018-20587: Bitcoin Core

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Bitcoin Core 0.12.0 through 0.17.1 and Bitcoin Knots 0.12.0 through 0.17.x before 0.17.1.knots20181229 have Incorrect Access Control. Local users can exploit this to steal currency by binding the RPC IPv4 localhost port, and forwarding requests to the IPv6 localhost port.

Affected products

• Bitcoin Bitcoin Core: from 0.12.0, up to and including 0.17.1
• Bitcoinknots Bitcoin Knots: from 0.12.0, up to and including 0.17.0

Published 2019-02-11. Last modified 2026-06-17.