---
id: CVE-2026-61544
title: >-
  libp2p-rust is the official Rust language implementation of the libp2p
  networking stack
summary: >-
  libp2p-rust is the official Rust language implementation of the libp2p
  networking stack. Prior to 0.13.1, libp2p-quic could panic during an inbound
  QUIC handshake when a remote peer presented a valid short-lived libp2p TLS
  certificate an…
severity: high
cvss: 8.2
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-248
vendor: libp2p
product: rust-libp2p
affected:
  - rust-libp2p < 0.13.1
patched:
  - libp2p-quic 0.13.1
published: '2026-09-15'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:16:44.627'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61544'
references:
  - url: >-
      https://github.com/libp2p/rust-libp2p/commit/212f3774af048e2cecfb2e6b1e08477685e52b22
    label: security-advisories@github.com
  - url: >-
      https://github.com/libp2p/rust-libp2p/commit/e8f35e12c2418b04df6e9cdf036005e8aee3c7a2
    label: security-advisories@github.com
  - url: 'https://github.com/libp2p/rust-libp2p/pull/6525'
    label: security-advisories@github.com
  - url: >-
      https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-5hq8-qhww-jm7q
    label: security-advisories@github.com
  - url: >-
      https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-5hq8-qhww-jm7q
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-5hq8-qhww-jm7q'
  - url: 'https://github.com/libp2p/rust-libp2p'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - rust
  - osv
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-17T16:47:52.414433Z'
cvssSource: cna
epss: 0.00231
epssPercentile: 0.14169
aliases:
  - GHSA-5hq8-qhww-jm7q
ecosystem: rust
ingestedAt: '2026-09-15T20:44:02.400Z'
---

## Overview

libp2p-rust is the official Rust language implementation of the libp2p networking stack. Prior to 0.13.1, libp2p-quic could panic during an inbound QUIC handshake when a remote peer presented a valid short-lived libp2p TLS certificate and delayed the final TLS 1.3 handshake fragment until after the certificate expired. In the Quinn post-handshake upgrade path, transports/quic/src/connection/connecting.rs called libp2p_tls::certificate::parse a second time in remote_peer_id and used expect on the result. The repeated wall-clock validity check could reject the now-expired certificate, causing the expect call to terminate any application exposing an affected libp2p-quic listener. This vulnerability is fixed in 0.13.1.

## Remediation

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

## Package advisory (CVE-2026-61544)

Affected packages:

- `libp2p-quic < 0.13.1`

Patched in:

- `libp2p-quic 0.13.1`

Source: https://github.com/advisories/GHSA-5hq8-qhww-jm7q