Security

Symbiosis Bitcoin Bridge Attacked, 15 BTC Recovered

On September 11, the cross-chain liquidity protocol Symbiosis experienced an attack on its Bitcoin bridge, exploiting a vulnerability. BTC-related routes have been suspended, and the team has recovered approximately 15 BTC. Symbiosis has offered the attacker a 20% white hat bounty.

Saturday, September 12, 2026BTC
Issue cover: Institutional Flows and Macroeconomic Influences Shape Crypto Market
Visual for this issue

Symbiosis Bitcoin Bridge was attacked on September 11.

A vulnerability was exploited, and BTC-related routes were suspended.

Approximately 15 BTC have been recovered by the team.

A 20% white hat bounty has been offered to the attacker.

Story

The cross-chain liquidity protocol Symbiosis was targeted in an attack on its Bitcoin bridge on September 11, at approximately 04:28 UTC. The perpetrator exploited a vulnerability, leading to the immediate suspension of all BTC-related routes. Symbiosis clarified that the incident exclusively impacted the Bitcoin Bridge, and the affected system was isolated from other components, ensuring other cross-chain routes and Octopools remained unharmed and operational. The team has successfully recovered approximately 15 BTC, which are now held in a multi-sig wallet controlled by the team. Symbiosis has offered the attacker a 20% white hat bounty for the stolen funds, with a deadline of September 13. If the attacker fails to return the funds, an equal proportion bounty will be offered to anyone who can assist in recovering the assets. The final loss amount is still being tallied, and the team will contact affected liquidity providers individually to develop a compensation plan. Such attacks underscore the persistent security risks within the decentralized finance landscape.

Issue context

The crypto market in this issue is characterized by opposing forces. While spot Ethereum ETFs record significant inflows, particularly through BlackRock's ETHA, spot Bitcoin ETFs experience outflows for the fourth consecutive day. This divergence suggests a potential reallocation of institutional capital, moving from Bitcoin towards Ethereum. Simultaneously, macroeconomic factors, such as increased expectations for a Federal Reserve interest rate hike, weigh on overall risk sentiment and contribute to a decline in total market capitalization. XRP's volatility remains low as the market awaits key regulatory and monetary policy decisions, underscorcoring the crypto sector's continued sensitivity to traditional financial signals.

Current market movements reveal a clear institutional preference for Ethereum over Bitcoin in ETF products, while macroeconomic uncertainties influence the entire risk spectrum. Note the heightened sensitivity to traditional financial news and the potential for extended consolidation phases in altcoins like XRP. Ongoing accumulation by institutional Bitcoin products and inflows into centralized exchanges suggest underlying demand, but this is overshadowed by external factors. Be aware that market sentiment can shift rapidly, especially with upcoming regulatory and monetary policy decisions.

Market pulse

BTC

$77.2K

-1.25% 24h / -4.7% 7d

Fear & Greed

56

Greed

BTC Funding

+0.0045%

20 perp markets · OI $51.7B

BTC Open Interest

$51.7B

Top venue Binance (Futures) · 24h vol $92.5B · basis +0.031%

More from this issue

This story is part of the Biturai Market Brief and is for informational purposes only. No investment advice.