Low0xCERT-2026-0265·2026-10-22

WAX Bridge Zero-Fee Withdrawal Exploit

A missing fee check in WAX's bridge withdraw function let an attacker pull mapped tokens for free, draining about $90,500 across WAX, Solana and Ethereum.

Vuln-watch · relayed from a public source; see Source & attribution below

Affected chainsOther / Multi-chainSolanaEthereum

Summary

A missing fee check in WAX's bridge withdraw function let an attacker pull mapped tokens for free, draining about $90,500 across WAX, Solana and Ethereum.

Incident

Victim: WAX
Date (UTC): 2026-10-22
Estimated loss: $91k
Chain(s): WAX, Solana, Ethereum
Attack type: bridge exploit
Funds status: stolen

Recommended actions

Revoke token approvals granted to WAX contracts until the project confirms they are safe
Integrators: pause or delist affected assets and monitor for attacker fund movements
Beware of follow-on phishing: ignore unofficial "refund", "recovery", or "claim" links and DMs; use the project's verified channels only

Source & attribution

Full analysis on Blockchain Breaches, 0xCERT's incident archive: https://www.blockchainbreaches.com/en/breaches/wax-2026. Primary sources: https://www.cryptotimes.io/2026/10/22/wax-multi-chain-bridge-exploited-for-roughly-75000/ ; https://panews.io/articles/01a1639c-8105-77ef-ac08-6abb865d1299 ; https://coinfomania.com/wax-suffers-90-5k-loss-due-to-technical-oversight/ ; https://phemex.com/news/article/wax-multichain-bridge-exploited-attacker-extracts-75000-in-crosschain-assets-100687.

References

Indicators of compromise

All IOC feeds →

tx406b76e85ac057ac7322d4bf7ddbea6ac4a2b23539deaa00ea635d17518fb0c9WAX bridge example exploit tx (per Blockaid) · WAX

OpenPGP-signed. The signed text of this advisory verifies against the 0xCERT key CCC7 D9EC 9415 723D.

Published 2026-10-22 · last updated 2026-10-23

curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0265/signed.txt | gpg --verify