CVE-2013-2272: Bitcoin Bitcoin-Qt

Medium severity, CVSS 5.0. EPSS: 1.9% chance of exploitation in the next 30 days.

The penny-flooding protection mechanism in the CTxMemPool::accept method in bitcoind and Bitcoin-Qt before 0.4.9rc1, 0.5.x before 0.5.8rc1, 0.6.0 before 0.6.0.11rc1, 0.6.1 through 0.6.5 before 0.6.5rc1, and 0.7.x before 0.7.3rc1 allows remote attackers to determine associations between wallet addresses and IP addresses via a series of large Bitcoin transactions with insufficient fees.

Affected products

• Bitcoin Bitcoin-Qt: up to and including 0.4.8; version 0.4 only; version 0.5.0 only; version 0.5.0.4 only; version 0.5.1 only; version 0.5.3.0 only; …
• Bitcoin Bitcoin Core: any version; version 0.3.4 only; version 0.3.5 only; version 0.3.8 only; version 0.3.10 only; version 0.3.11 only; …
• Bitcoin Bitcoind: up to and including 0.4.4; version 0.5.7 only; version 0.6.0.0 only; version 0.6.0.10 only; version 0.6.3 only; version 0.6.4 only; …

Published 2013-03-12. Last modified 2026-06-16.