L2 Standard Bridged WETH (Base) news today is focused on Base network readiness ahead of the scheduled Cobalt upgrade, while the token continues to track broader Ethereum market strength rather than a newly announced WETH-specific catalyst. Base’s Sepolia testnet upgrade window is scheduled for September 23, 2026, from 18:00 to 20:00 UTC, with node operators reportedly required to run version 1.4.0 or later.