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Description

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.

PUBLISHED Reserved 2026-03-25 | Published 2026-04-22 | Updated 2026-04-23 | Assigner GitHub_M




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-617: Reachable Assertion

Product status

< 1.3.0
affected

References

github.com/...atross/security/advisories/GHSA-74hp-mhfx-m45h

github.com/nimiq/core-rs-albatross/pull/3666

github.com/...ommit/e0d4e01994f061bf41d3c2835bc74040d3c084f5

github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0

cve.org (CVE-2026-34063)

nvd.nist.gov (CVE-2026-34063)

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