#PolkadotFoundationWarnsFearlessWalletExtensionLeakedPrivateKeys

A serious security alert is going around the Polkadot community. ⚠ According to the warning described in the post that inspired this article, certain versions of the **Fearless Wallet browser extension** sent users' private keys to an attacker's server. If you use Polkadot wallets, read this carefully and act fast. 👇

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**🔍 What Happened?**

The reported details of the advisory:

⚠ **Affected versions:** 3.0.1, 3.0.3, 3.0.4 and 3.0.5 of the Fearless Wallet extension. The affected versions sent keys to an attacker's server whenever a user unlocked the wallet. 🔓

📅 **Timeline:** The malicious code was reportedly introduced on **February 19, 2025**, and was active at times until **October 10, 2026**. That is a long exposure window of more than a year and a half. ⏳

📉 **Losses so far:** 8 users reported unauthorized transfers totaling **17,286 DOT**. 💾

đŸ‘„ **Reach:** An affected Chrome version still showed about **6,000 users**. 🌐

đŸ“± **Good news:** The reviewed mobile apps reportedly do not contain the malicious code. ✅

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**🧠 Why This Is Serious**

A private key controls your funds completely. đŸ—ïž If an attacker has it, they can move your assets whenever they want, without needing your password. A wallet that leaks keys on unlock is one of the worst-case scenarios for a non-custodial wallet. 😹

This is also a **supply-chain attack**. đŸ§© The danger came from software that users trusted and installed, not from the Polkadot network itself. Polkadot's blockchain was not hacked.

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**đŸ›Ąïž What Should You Do Right Now?**

If you have used the Fearless Wallet extension since February 2025, act immediately:

1ïžâƒŁ **Create new keys in a different, trusted wallet.** Use a new seed phrase generated on a clean device. 🆕

2ïžâƒŁ **Move your funds to the new wallet.** Move the most valuable assets first. 🏃

3ïžâƒŁ **Don't just change your password.** A new password or a reinstall will not help, because the old keys are already exposed. ❌

4ïžâƒŁ **Stop using the old keys.** Treat any account created or imported in the affected extension as compromised. đŸš«

5ïžâƒŁ **Check linked accounts.** If you reused the same seed phrase elsewhere, move those funds too. 🔍

6ïžâƒŁ **Remove the extension.** Uninstall it from your browser after your funds are safe. đŸ§č

⏰ Speed matters. The longer your funds sit in an exposed account, the bigger the risk. Keep in mind that staked funds may take time to unbond, so start any unstaking process right away. 🔓

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**🔐 How to Protect Yourself in the Future**

✅ **Use a hardware wallet** for large holdings. 🧊 Private keys stay on the device, even if the browser is compromised.

✅ **Keep long-term savings off browser extensions.** Use extensions only for small, active balances. đŸ’Œ

✅ **Review your extensions regularly.** Remove ones you don't use, and check permissions. 🧐

✅ **Be careful with updates.** A trusted extension can become dangerous after an update, as this case shows. 🔄

✅ **Spread funds across wallets.** Don't keep everything in one place. đŸ§ș

✅ **Follow official channels.** Check security alerts on the project's official website and social accounts. 📱

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**📉 What Does This Mean for DOT?**

This looks like a wallet-level security failure, not a flaw in the Polkadot network. 🔗 The incident should have limited direct effect on how the blockchain works, but it can hurt confidence in the ecosystem's tooling. The post puts DOT near $1.18. 💰 Check the live price before you quote it.

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**💬 Your Turn**

Have you checked which browser extensions hold your keys? đŸ€” Share this warning with friends who use Polkadot wallets. 👇

⚠ *This is not financial advice. Always do your own research and protect your private keys.*

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#Polkadot #DOT #CryptoSecurity #WalletSafety #CryptoNews

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I couldn't find the Polkadot Foundation advisory itself, so the version numbers, dates, 17,286 DOT in losses and 6,000 users all come from your post. Please check the official Polkadot channels before you publish, and correct anything that differs.

Sources:

- [Fearless: Overview (Polkadot Support)](https://support.polkadot.network/support/solutions/articles/65000185844-fearless-overview)

- [Wallets and Extensions (Kusama Guide)](https://guide.kusama.network/docs/wallets-and-extensions)#OCCIssuesFirstFinalRuleUnderGENIUSAct #110AutomatedWalletsGenerate99.6%OfRLUSDPayments #KoreanRetailLost6.3TrillionWonOnLeveragedETPs #EarningsSeason