Across Protocol

Across Protocol receives a C+ risk grade (38/100) from Hindenrank, where lower scores indicate lower risk. Elevated risk — never been directly hacked, but relies on a custom oracle system with a proven attack vector demonstrated in the Polymarket incident A bridge that moves crypto between blockchains by having professional relayers front the money for instant transfers. It holds $41M in liquidity pools and has never been directly exploited in 2+ years of operation. Its C+ grade reflects the use of a custom oracle system (UMA) that has a proven attack vector demonstrated in the $7M Polymarket incident.

The key risks identified for Across Protocol are: (1) The system that verifies bridge transfers uses UMA token voting, and a $7M attack on Polymarket proved that a single wealthy actor can buy enough votes to approve fake transactions. This same mechanism secures Across. (2) Your transfer depends on professional relayers completing it. If they go offline during a market crash, your money could be delayed. (3) There is only a 1-hour window to catch fraudulent transfers. If nobody is watching during that hour, a fake claim gets approved and paid out from the liquidity pool.

Across Protocol scores 38/100 across eight risk dimensions: Mechanism Novelty: 6/15, Interaction Severity: 8/20, Oracle Surface: 7/10, Documentation Gaps: 2/10, Track Record: 3/15, Scale Exposure: 3/10, Regulatory Risk: 3/10, Vitality Risk: 6/10. The highest risk area is Oracle Surface at 7/10.

Among 24 rated Bridge protocols on Hindenrank, Across Protocol ranks #8 by safety (lowest risk score = safest). Its 38/100 risk score and C+ grade place it among the safer Bridge protocols.

Across Protocol scores 3/15 on the Track Record risk dimension, indicating some history of security incidents or exploits. Higher scores reflect more severe or frequent incidents. Review the full risk report for details.