Bitcoin Core developers have published version 31.1rc1, a release candidate that addresses a privacy vulnerability before the next stable release reaches the broader network of node operators
Bitcoin Core developers have published version 31.1rc1, a release candidate that addresses a privacy vulnerability before the next stable release reaches the broader network of node operators and wallet users.
The v31.1rc1 release candidate, published on GitHub, is a maintenance update to the Bitcoin Core 31.x branch. Release candidates serve as near-final builds that allow contributors and node operators to test changes before a version is marked stable. For related coverage, see OKX Launches OKX AI Marketplace for Onchain AI Agents.
The central fix targets a privacy issue related to IP address exposure during transaction broadcasting. The Bitcoin Core project disclosed the vulnerability in a dedicated security advisory on June 6, 2026, describing how the private broadcast mechanism could leak a node's IP address under certain conditions. For related coverage, see MetaMask Money Account Launches With Stablecoin Yield and Wallet Spending.
This type of flaw can allow observers to correlate Bitcoin transactions with the IP addresses of the nodes that originated them, undermining the pseudonymous properties that many users rely on.
Bitcoin Core is the reference implementation of the Bitcoin protocol. Nodes running it form the backbone of transaction validation and relay across the network. A privacy leak at the node level can expose not just individual users but the operators of infrastructure that routes transactions for others.
Node operators who accept incoming connections are particularly exposed to IP correlation attacks. Fixing the issue in a point release rather than waiting for the next major version reduces the window during which nodes remain vulnerable.
The fix also has implications for wallet users who run their own nodes for privacy, a practice that has grown alongside broader interest in Bitcoin adoption by sovereign entities and institutional holders seeking self-custody.
Release candidates in the Bitcoin Core workflow typically undergo a testing period where developers, miners, and node operators run the build in controlled environments. If no critical issues emerge, the release candidate advances to a stable tag.
Further fixes or regressions discovered during the rc1 testing window could result in additional release candidates before the final 31.1 stable version ships. The process reflects the project's conservative approach to software that secures a network processing billions of dollars in daily value.
The timing of this patch, arriving while crypto markets navigate shifting ETF flows and evolving regulatory frameworks, underscores how protocol-level security work continues regardless of market conditions. Node operators tracking the release can monitor the GitHub repository for updates on the testing timeline.
Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency and digital asset markets carry significant risk. Always do your own research before making decisions.
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