PT-2026-34544 · Nimiq · Network-Libp2P

Published 2026-04-22 · Updated 2026-04-22 · CVE-2026-34063

Mitre

CVSS v3.1

7.5

High

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

Nimiq's network-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, network-libp2p discovery uses a libp2p ConnectionHandler state machine. the handler assumes there is at most one inbound and one outbound discovery substream per connection. if a remote peer opens/negotiate the discovery protocol substream a second time on the same connection, the handler hits a panic!("Inbound already connected") / panic!("Outbound already connected") path instead of failing closed. This causes a remote crash of the networking task (swarm), taking the node's p2p networking offline until restart. The patch for this vulnerability is formally released as part of v1.3.0. No known workarounds are available.

Fix

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

CVE-2026-34063

Affected Products

Network-Libp2P

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-34063 · Security Note
• https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0 · Note
• https://github.com/nimiq/core-rs-albatross/commit/e0d4e01994f061bf41d3c2835bc74040d3c084f5 · Note
• https://github.com/nimiq/core-rs-albatross/pull/3666 · Note
• https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-74hp-mhfx-m45h · Note