---
id: CVE-2026-89146
title: >-
  libp2p-rendezvous through 0.17.1 fails to validate registration TTL values in
  discovery responses, allowing attackers to trigger timer arithmetic overflow
summary: >-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-190
  - CWE-617
vendor: libp2p
product: libp2p-rendezvous
affected:
  - libp2p-rendezvous <= 0.17.1
published: '2026-09-11'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:43.997'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89146'
references:
  - url: 'https://docs.rs/crate/libp2p-rendezvous/0.17.1/source/src/client.rs'
    label: disclosure@vulncheck.com
  - url: 'https://gist.github.com/thesmartshadow/25ef03f7ebbd12118a9d27695c885989'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/libp2p/rust-libp2p'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/libp2p-rendezvous-through-0.17.1-denial-of-service-via-unbounded-registration-ttl-in-discovery-responses
    label: disclosure@vulncheck.com
  - url: 'https://gist.github.com/thesmartshadow/25ef03f7ebbd12118a9d27695c885989'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.0063
epssPercentile: 0.47905
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-11T18:56:08.559551Z'
ingestedAt: '2026-09-14T13:33:47.163Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.