Pinning Attacks
Security● Common
Attacks exploiting mempool policy to prevent confirmation of time-sensitive transactions. Attacker creates conflicting transactions that are difficult to fee-bump, potentially causing victims to lose funds in Lightning or other protocols.
Technical Notes
Types: BIP-125 Rule 3 pinning (large low-fee child), absolute fee pinning. Mitigations: v3 transactions, package relay, cluster mempool. Example: attacker pins victim's justice tx while cheating tx confirms.
Metadata
Visibility: Public
Created:1/3/2026by System