News report ₿ Crypto 🌍 GLOBAL

Bitcoin Core Discloses Three Patched Security Flaws After 13-Month Delay

Bitcoin Core disclosed three historical security vulnerabilities on Tuesday, including a Tor-related bypass and a high-severity mining node bug, all of which were patched in October 2025.

🕐 1 min read

1 assets impacted (Crypto). Net bias: 0 Bullish, 0 Bearish, 1 Neutral. Strongest signal: BTC → 2/10 (70% confidence).

📊 Affected Assets (1)

BTC
Neutral 🤖 70%
📅 Short-term 🌍 GLOBAL · Explicit

Bitcoin Core disclosed three security flaws on Tuesday, including one that let Tor users bypass spam and privacy protections on thousands of nodes and a high-severity bug that could stop a mining node from building valid blocks until restarted. All three were already patched in October 2025 and the advisory reports no attacks, so the network itself is unaffected going forward. The disclosures are routine and historical, arguing against any material price move for bitcoin.

Catalysts
  • • Formal Bitcoin Core security advisory published Tuesday, Nov. 12, 2026, detailing three flaws
  • • Disclosure covers a flaw that whitelisted all incoming Tor connections on thousands of mainnet nodes
Risk Factors
  • • All fixes were released in October 2025 and the last affected 29.x series left support on Oct. 27, so patches are already deployed
  • • Advisory reports no actual attacks or exploits

🧭 Full analysis of these assets

🎯 Key Takeaways

  • Bitcoin Core disclosed three security flaws on Tuesday, all of which were patched in releases issued in October 2025.
  • A medium-severity Tor flaw allowed external connections to inherit trusted whitelist permissions on thousands of mainnet nodes.
  • A high-severity bug could prevent mining nodes from building valid blocks until the software was restarted.
  • The advisory was published 13 months after the initial fix to comply with a policy that waits until affected software versions reach end-of-support.

📝 Executive Summary

Bitcoin Core developers published a formal security advisory on Tuesday detailing three vulnerabilities, including a medium-severity flaw that allowed Tor users to bypass node privacy protections. All identified bugs were patched in October 2025, with the disclosure delayed to ensure operators had sufficient time to upgrade their systems before public release.

❓ FAQ

Are these Bitcoin bugs a current threat to the network?

No. The article states all three flaws were patched in releases issued in October 2025, and the advisories were only published Tuesday because of a disclosure policy that waits for operators to upgrade.

Were the bugs exploited?

The advisory does not report any attacks. The article notes that nodes which never enabled the whitelist setting were unaffected by the Tor flaw.