Blockchain Bridges: Linking Blockchains—But How Secure Are They?

Understanding Blockchain Bridges: An Introductory Overview for

Users

A blockchain bridge refers to a system or protocol that allows digital assets and information to move between separate blockchain platforms. For those using networks like Komodo, which focus on cross-chain compatibility and decentralized finance (DeFi), bridges are essential for linking different blockchains, enabling transactions across chains, and increasing the practical use of tokens. Nevertheless, recent notable security incidents in DeFi stress the necessity of being aware of both the benefits and potential dangers these solutions present.

Bridges between blockchains typically function by locking assets on one network and generating corresponding tokens on another, often utilizing smart contracts to automate and secure the process without the need for a central authority. This setup lets users take advantage of the unique features of various blockchains—like Ethereum’s programmable contracts and Bitcoin’s robust security—while avoiding centralized control. For example, Komodo’s technology for connecting blockchains supports effortless transfers between its own network and others, enabling features such as decentralized trading and cross-chain liquidity pools, as highlighted in a

.

Even with their advantages, blockchain bridges are frequent targets for cyberattacks. In November 2025, the DeFi platform built on Ethereum called

experienced a $117 million security breach when attackers exploited a flaw in its V2 pools, draining funds from several wallets, according to a . The breach was caused by an error in the manageUserBalance function’s access controls, which permitted unauthorized fund withdrawals. This event highlights the dangers of vulnerabilities in smart contracts and the critical need for thorough code reviews—a lesson for both bridge creators and users.

Protecting blockchain bridges is of utmost importance. The Balancer hack was one of several DeFi attacks in 2025, including a $70 million loss in August involving staked Ether, as covered by

. Attackers may use methods such as flash loans, phishing, or exploiting unresolved bugs to steal assets. To counter these threats, protocols should implement safeguards like multi-signature wallets, formal code verification, and continuous monitoring. Komodo users can reduce risk by choosing bridges with clear governance and audited smart contracts, as previously mentioned in the Yahoo Finance report.

Komodo’s strategy for cross-chain compatibility centers on security through a modular approach. Developers can build custom blockchains that still connect to Bitcoin’s proof-of-work system, which lessens dependence on centralized bridges. This approach fits with the industry’s move toward “sovereign AI” and decentralized systems, where users retain control over their assets and data, as stated in a

. Still, as DeFi platforms become more sophisticated, the need for secure and easy-to-use bridges will continue to grow.

For newcomers, using blockchain bridges demands careful attention. It’s important to confirm the authenticity of cross-chain transfers, keep an eye on transaction costs, and steer clear of unverified protocols during ongoing attacks. The Balancer cases show how quickly security issues can escalate, putting even experienced investors at risk, as noted in the earlier Yahoo Finance article.

As blockchain technology advances, bridges will play a vital role in the DeFi ecosystem. However, their effectiveness depends on finding the right balance between innovation and security—a challenge that platforms like Komodo and Balancer are actively addressing.