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Bitcoin Core Faces Security Risks as 44% of Nodes Use Unsupported Versions

Bitcoin Core Faces Security Risks as 44% of Nodes Use Unsupported Versions

First seen 24 Oct 2026, 20:43 UTC • •
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ThreatCluster AI
ThreatCluster •October 24, 2026 at 22:13 UTC
  • •43.6% of Bitcoin Core nodes run unsupported versions, risking security vulnerabilities.
  • •New policy allows faster backporting of fixes for easily rediscovered vulnerabilities.
  • •Version 29.x will lose support after October 10, 2026, increasing exposure for users.

Bitcoin Core has announced accelerated security fixes due to a significant number of nodes running unsupported versions. A recent survey indicated that 43.6% of Bitcoin Core peers, totaling 3,671 out of 8,422, are using outdated software, a figure that could rise to 51.1% with the upcoming release of version 32.0. The new policy allows developers to backport fixes for easily rediscovered vulnerabilities to all maintained releases, addressing concerns that the previous embargo period delayed updates. The changes come in response to the growing threat posed by AI-assisted vulnerability discovery. The last major version, 29.x, will no longer receive support after October 10, 2026, leaving many nodes vulnerable if not updated. The current snapshot reflects a concerning trend in node maintenance and security within the Bitcoin network.

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Timeline

2026-05-05
CVE-2024-52911 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-10-10
End of support for version 29.x
Bitcoin Core will cease maintenance for version 29.x, leaving users on this version without security updates.
CryptoTicker
2026-10-22
Bitcoin Core policy amendment
Developers can now backport fixes for easily rediscovered vulnerabilities to all maintained releases.
Cryptoslate

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Common questions

What percentage of nodes are affected?
43.6% of surveyed Bitcoin Core nodes are running unsupported versions.
What is the deadline for updating nodes?
Users must update from version 29.x before October 10, 2026, to continue receiving security fixes.
What vulnerabilities are being addressed?
The new policy allows for quicker fixes for easily rediscovered vulnerabilities, but specific CVEs are not detailed.