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Polkadot warns users to move funds following Fearless Wallet extension breach

Polkadot has issued an urgent security warning after discovering that the third-party Fearless Wallet browser extension was compromised and has been leaking user private keys since February 2025.

Fearless Wallet logo featuring a bright pink bird-like emblem and text against a plain white background.
Image: @CoinMarketCap

Polkadot has issued a security alert warning that the third-party Fearless Wallet browser extension has been compromised, according to the Polkadot Technical Fellowship. The breach has reportedly exposed users' private keys since February 2025.[1][2][4]

Core engineering warnings advise anyone who utilized the Fearless Wallet browser client over the past twenty months to immediately create new key pairs on a separate wallet platform. Users are urged to transfer all crypto assets, including DOT, as soon as possible to prevent potential loss of funds.[1][2][3][4]

Key facts

  • The Polkadot Technical Fellowship issued a security alert regarding the third-party Fearless Wallet browser extension.
  • The compromised Fearless Wallet extension has been leaking user private keys since February 2025.
  • Users who used the browser extension over the last twenty months are advised to create new keys in a different wallet.
  • Affected users are urged to transfer their assets, including DOT, to secure their funds.

Sources · 4 sources

  1. TW

    The Wolf Of All Streets@scottmelkerPost on X ·

    POLKADOT $DOT WARNS THE THIRD-PARTY FEARLESS WALLET BROWSER EXTENSION HAS BEEN COMPROMISED AND LEAKING USERS' PRIVATE KEYS SINCE FEBRUARY 2025 USERS ARE URGED TO CREATE NEW KEYS IN A DIFFERENT WALLET AND MOVE THEIR FUNDS AS SOON AS POSSIBLE

    Open source
  2. BS

    BSCN@BSCNewsPost on X ·

    Polkadot reveals security breach across Wallet Extension @Polkadot Technical Fellowship raised a security alert for its community. The team stated that the third-party Fearless Wallet browser extension was compromised and has been leaking users' private keys since February 2025. The core engineering team warns users who used the browser client in the last twenty months to create new key pairs on other wallets and move their assets, including $DOT, to ensure the security of their funds.

    Open source
  3. CB

    Crypto BriefingArticle ·

    Polkadot warns Fearless Wallet users to move funds after key leak The incident underscores the critical need for robust security measures and timely communication to protect users in decentralized ecosystems. The post Polkadot warns Fearless Wallet users to move funds after key leak appeared first on Crypto Briefing .

    Open source
  4. CO

    CoinMarketCap@CoinMarketCapPost on X ·

    LATEST: 🚨 Polkadot warns the Fearless Wallet browser extension has been compromised and leaking private keys since February 2025, urging affected users to create a new keypair and move their funds. https://t.co/DrMnLaJRBA

    Open source