CVE-2026-89146: LIBP2P LIBP2P-Rendezvous

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

libp2p-rendezvous through 0.17.1 fails to validate registration TTL values in discovery responses, allowing attackers to trigger timer arithmetic overflow. A malicious rendezvous server can send a discovery response with an unbounded TTL value that causes the client node process to panic when computing the expiry timer.

Affected products

• LIBP2P LIBP2P-Rendezvous: up to and including 0.17.1

Published 2026-09-11. Last modified 2026-09-23.