---
title: "CVE-2026-89146: libp2p-rendezvous - Denial of Service"
description: "libp2p-rendezvous <= 0.17.1 contains a denial of service caused by failure to validate registration TTL values in discovery responses, letting malicious rendezvous servers trigger timer arithmetic overflow and crash client nodes, exploit requires interaction with a malicious server."
url: https://panop.io/threat-heartbeat/CVE-2026-89146/
---

# CVE-2026-89146 libp2p-rendezvous - Denial of Service

libp2p-rendezvous <= 0.17.1 contains a denial of service caused by failure to validate registration TTL values in discovery responses, letting malicious rendezvous servers trigger timer arithmetic overflow and crash client nodes, exploit requires interaction with a malicious server.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.63% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89146)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

11 September 2026

Updated

15 October 2026

Weakness

[CWE-190](https://cwe.mitre.org/data/definitions/190.html)

## Vendor fix

Update to a version later than 0.17.1 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89146](https://nvd.nist.gov/vuln/detail/CVE-2026-89146)
- [https://docs.rs/crate/libp2p-rendezvous/0.17.1/source/src/client.rs](https://docs.rs/crate/libp2p-rendezvous/0.17.1/source/src/client.rs)
- [https://gist.github.com/thesmartshadow/25ef03f7ebbd12118a9d27695c885989](https://gist.github.com/thesmartshadow/25ef03f7ebbd12118a9d27695c885989)
- [https://github.com/libp2p/rust-libp2p](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://www.vulncheck.com/advisories/libp2p-rendezvous-through-0.17.1-denial-of-service-via-unbounded-registration-ttl-in-discovery-responses)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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