What’s Vulnerable › Vulnerabilities

CVE-2026-89146: libp2p-rendezvous through 0.17.1 Denial of Service via Unbounded Registration TTL in Discovery Responses

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-09-23
• Weakness: CWE-190

Description

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-rendezvous: through 0.17.1

References

• https://docs.rs/crate/libp2p-rendezvous/0.17.1/source/src/client.rs
• https://gist.github.com/thesmartshadow/25ef03f7ebbd12118a9d27695c885989
• https://github.com/libp2p/rust-libp2p
• https://www.vulncheck.com/advisories/libp2p-rendezvous-through-0.17.1-denial-of-service-via-unbounded-registration-ttl-in-discovery-responses
• https://gist.github.com/thesmartshadow/25ef03f7ebbd12118a9d27695c885989

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