CVE-2026-35405: high-severity vulnerability in libp2p rust-libp2p
libp2p-rendezvous: Unlimited namespace registrations per peer enables OOM DoS on rendezvous servers
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.4%
libp2p-rust is the official rust language Implementation of the libp2p networking stack. Prior to 0.17.1, libp2p-rendezvous server has no limit on how many namespaces a single peer can register. A malicious peer can just keep registering unique namespaces in a loop and the server happily accepts every single one allocating memory for each registration with no pushback. Keep doing this long enough (or with multiple sybil peers) and the server process gets OOM killed. This vulnerability is fixed in 0.17.1.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
libp2p · rust-libp2pRelated CVEs — libp2p rust-libp2p
In the same product, most dangerous first.
CVE-2022-23486HIGHlibp2p-rust denial of service vulnerability from lack of resource managementEPSS 0.7%CVE-2026-33040HIGHlibp2p-rust: Gossipsub PRUNE.backoff Duration OverflowEPSS 0.6%CVE-2026-34219HIGHlibp2p-gossipsub: Gossipsub PRUNE Backoff Heartbeat Instant OverflowEPSS 0.6%CVE-2026-35457HIGHlibp2p-rust has unbounded rendezvous DISCOVER cookies enable remote memory exhaustionEPSS 0.3%CVE-2026-95859HIGHlibp2p-rust: Gossipsub GRAFT topics unbounded growthEPSS 0.3%CVE-2026-61544HIGHlibp2p-quic: Remote panic via certificate expiry race during QUIC handshakeEPSS 0.3%