A validation mismatch triggered an unexpected fork on the Cardano network on Nov 21, 2025, and a user publicly apologized for broadcasting the faulty transaction. The incident—described as a "poisoned transaction attack"—briefly disrupted block validation for ADA nodes.
Cardano (ADA) slipped below key support and confirmed a death cross on November 3, intensifying bearish sentiment. The 50-day moving average crossing under the 200-day signals a potential turning point for ADA's short-term trend.