Biggest risks in Immutable X IMX token staking

The Immutable X chain sunset on 11 February 2026, forcing a complete migration of assets to Immutable zkEVM between 5 and 9 March 2026. This transition created immediate liquidity traps for users who missed the manual withdrawal window or failed to finalize pending transactions on Ethereum. Staking rewards depend on active protocol usage, requiring traders to execute at least one NFT trade per cycle to qualify for distributions from the fee pool. The shift to zkEVM introduced new operational dependencies that heighten the risk of permanent fund loss if users do not manage their wallets correctly during the network upgrade period.

Operational friction and stuck funds

Users who initiated withdrawals before the 11 February 2026 cutoff but did not finalize them on Ethereum face a specific technical hurdle where funds remain held by the bridge contract. If the withdrawal process fails with a "USER_UNREGISTERED" error, the user must register their Stark key using a dedicated tool to claim the assets. Deposits made after the chain sunset but before the final legacy bridge upgrade can result in permanently stuck funds, a risk mitigated only by public communication timelines that many users may overlook. The automated migration process transfers remaining balances to zkEVM, but it strictly excludes pending withdrawals and burnt assets, leaving those categories to be handled manually or lost if ignored.

The disbursement mechanism relies on permissioned operators to execute timely payouts, creating a trust assumption that these entities will not leave user funds stranded indefinitely. While cryptographic proofs gate the actual recipient correctness, the operator controls the pace of the migration phases. This centralized control point introduces a latency risk where high-value vaults might be prioritized over smaller holders, extending the time required to access migrated assets.

Reward volatility and security limits

Staking rewards derive from 20% of the 2% protocol fee collected on all trades, which is swapped into IMX on the open market. Because this revenue stream fluctuates directly with trading volume, reward amounts are highly variable and can drop significantly during low-activity periods. The promotional guarantee of at least 5% annual rewards applies only when 30% of the stakeable supply is staked, a condition that may not hold as the ecosystem matures. Smart contract audits, such as the one performed by Nethermind Security in February 2026, do not provide absolute security guarantees against novel attack vectors or off-chain compromises.

Complexity in multi-contract interactions often leads to blind spots that auditors miss, as seen in historical exploits like the Euler Finance hack where a previously unseen liquidation vector drained $197M. The immutable nature of the zkEVM disburser contract means that any critical bug discovered post-deployment cannot be patched without a hard fork or external intervention. Users must recognize that passing an audit is not a seal of invincibility, especially when the system depends on external bridges and cross-chain messaging via Axelar. The final account mappings are published for verification, but they originate from off-chain systems, introducing a layer of trust in the data integrity before it reaches the on-chain root commitment. How long will the permissioned operators maintain the migration infrastructure after the initial phased transfer concludes?