CVE-2026-34219

libp2p-rust is the official rust language Implementation of the libp2p networking stack. Prior to version 0.49.4, the Rust libp2p Gossipsub implementation contains a remotely reachable panic in backoff expiry handling. After a peer sends a crafted PRUNE control message with an attacker-controlled...

CVE-2026-34219 libp2p-gossipsub: Gossipsub PRUNE Backoff Heartbeat Instant Overflow

libp2p-rust is the official rust language Implementation of the libp2p networking stack. Prior to version 0.49.4, the Rust libp2p Gossipsub implementation contains a remotely reachable panic in backoff expiry handling. After a peer sends a crafted PRUNE control message with an attacker-controlled...

CVE-2026-34219

CVE-2026-34219 affects libp2p-rust’s libp2p-gossipsub: prior to 0.49.4, Gossipsub’s backoff expiry handling can overflow when adding Slack to an Instant, after a crafted PRUNE with attacker-controlled backoff. This remotely reachable panic is triggered in heartbeat processing and is exploitable o...