CVE-2020-12821

Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.

CVE-2022-47547

GossipSub 1.1, as used for Ethereum 2.0, allows a peer to maintain a positive score (and thus not be pruned from the network) even though it continuously misbehaves by never forwarding topic messages.