CVE-2026-95859
libp2p-rust is the official Rust language implementation of the libp2p networking stack.
Impact
libp2p-rust is the official Rust language implementation of the libp2p networking stack. Prior to 0.49.5, Gossipsub GRAFT control-message handling unconditionally adds attacker-supplied topic hashes to connected_peer.topics without confirming that the peer previously subscribed to those topics. A remote unauthenticated peer that can reach a Gossipsub listener can repeatedly send novel GRAFT topics, causing cumulative per-peer memory growth that is not bounded by subscription filters, peer scoring, or per-message size limits. This can exhaust process memory and cause a denial of service. This issue is fixed in version 0.49.5.
Affected products
| Product | Affected versions |
|---|---|
| Libp2p Networking Stack. | before 0.49.5 |
Versions were read from the advisory text. No structured product data has been published for this record yet.