Symbiosis exploit — $336k lost on BNB Chain, Ethereum

Summary

Symbiosis lost an estimated $336k on BNB Chain, Ethereum (unbacked cross-chain mint), according to the DeFiLlama hacks database. Users and integrators should review exposure and follow the project's official channels.

Incident

• Protocol: Symbiosis
• Date (UTC): 2026-09-10
• Estimated loss: $336k
• Chain(s): BNB Chain, Ethereum
• Technique: Unbacked Cross-Chain Mint
• Classification: Bridge & Cross-Chain
• Target: DeFi Protocol
• Bridge incident: yes

Recommended actions

• Revoke token approvals granted to Symbiosis 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

This 0xCERT advisory relays an incident recorded in the DeFiLlama hacks database (https://defillama.com/hacks). Figures are preliminary estimates and may be revised; refer to the project's own post-mortem for the authoritative record. Report additional details to 0xCERT at https://www.0xcert.com/report.