CVE-2026-34063

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.

• CWE-617

• https://github.com/nimiq/core-rs-albatross/commit/e0d4e01994f061bf41d3c2835bc74040d3c084f5Patch
• https://github.com/nimiq/core-rs-albatross/pull/3666Issue Tracking, Patch
• https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0Release Notes
• https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-74hp-mhfx-m45hPatch, Vendor Advisory

Published

Apr 22, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-34058Coolify is an open-source and self-hostable tool for managin…8.8
• CVE-2026-34059Buffer Over-read vulnerability in Apache HTTP Server. This …7.5
• CVE-2026-3406A vulnerability was found in projectworlds Online Art Galler…9.8
• CVE-2026-34060Ruby LSP is an implementation of the language server protoco…9.8
• CVE-2026-34061nimiq/core-rs-albatross is a Rust implementation of the Nimi…6.5
• CVE-2026-34062nimiq-libp2p is a Nimiq network implementation based on libp…5.3
• CVE-2026-34064nimiq-account contains account primitives to be used in Nimi…8.2
• CVE-2026-34065nimiq-primitives contains primitives (e.g., block, account, …7.5
• CVE-2026-34066nimiq-blockchain provides persistent block storage for Nimiq…5.3
• CVE-2026-34067nimiq-transaction provides the transaction primitive to be u…6.5
• CVE-2026-34068nimiq-transaction provides the transaction primitive to be u…6.8
• CVE-2026-34069nimiq/core-rs-albatross is a Rust implementation of the Nimi…5.3