---
id: CVE-2026-86039
title: libp2p is a JavaScript implementation of the libp2p networking stack
summary: >-
  libp2p is a JavaScript implementation of the libp2p networking stack. From
  8.0.0 until 12.0.24, @libp2p/peer-store in packages/peer-store/src/index.ts
  uses consumePeerRecord to verify a RecordEnvelope signature but does not
  require PeerR…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L'
cwe:
  - CWE-290
  - CWE-345
vendor: libp2p
product: js-libp2p
affected:
  - 'js-libp2p >= 8.0.0, < 12.0.24'
patched:
  - '@libp2p/peer-store 12.0.24'
published: '2026-09-17'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:19:05.340'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86039'
references:
  - url: >-
      https://github.com/libp2p/js-libp2p/commit/3bf5d395cbca1488eea6e87cd771e4613b661c30
    label: security-advisories@github.com
  - url: 'https://github.com/libp2p/js-libp2p/pull/3570'
    label: security-advisories@github.com
  - url: 'https://github.com/libp2p/js-libp2p/releases/tag/peer-store-v12.0.24'
    label: security-advisories@github.com
  - url: >-
      https://github.com/libp2p/js-libp2p/security/advisories/GHSA-vrf4-mx87-p53w
    label: security-advisories@github.com
  - url: >-
      https://github.com/libp2p/js-libp2p/security/advisories/GHSA-vrf4-mx87-p53w
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-vrf4-mx87-p53w'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - npm
epss: 0.0027
epssPercentile: 0.17061
aliases:
  - GHSA-vrf4-mx87-p53w
ecosystem: npm
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-21T20:48:30.538605Z'
ingestedAt: '2026-09-17T16:21:47.714Z'
---

## Overview

libp2p is a JavaScript implementation of the libp2p networking stack. From 8.0.0 until 12.0.24, @libp2p/peer-store in packages/peer-store/src/index.ts uses consumePeerRecord to verify a RecordEnvelope signature but does not require PeerRecord.peerId in the signed payload to equal the signer peer ID derived by RecordEnvelope.openAndCertify. The expectedPeer option checks only the envelope signer, and the gossipsub Peer Exchange path can provide the attacker's own peer ID as expectedPeer. An attacker can therefore sign a record with the attacker's key, place a victim peer ID and attacker-controlled multiaddrs in the payload, and have certified addresses stored for the victim. The poisoned addresses can cause address-book corruption, dial redirection or failure, routing manipulation, and reachability disruption, although the connection upgrade still verifies remote peer identity and prevents a complete identity takeover. The issue is fixed in version 12.0.24.

## Remediation

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

## Package advisory (CVE-2026-86039)

Affected packages:

- `@libp2p/peer-store >= 8.0.0, < 12.0.24`

Patched in:

- `@libp2p/peer-store 12.0.24`

Source: https://github.com/advisories/GHSA-vrf4-mx87-p53w