# CVE-2026-89146

## Summary

- **CVE ID:** CVE-2026-89146
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-190, CWE-617
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 11, 2026

## 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 — libp2p-rendezvous (0)

## References

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

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._