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Medium · 5.3 CVE-2026-34062 EUVD-2026-25056

Nimiq has Allocation of Resources Without Limits or Throttling in its libp2p request/response

Published Apr 22, 2026 · Updated Apr 23, 2026 · Assigned by GitHub_M

Description

nimiq-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, `MessageCodec::read_request` and `read_response` call `read_to_end()` on inbound substreams, so a remote peer can send only a partial frame and keep the substream open. because `Behaviour::new` also sets `with_max_concurrent_streams(1000)`, the node exposes a much larger stalled-slot budget than the library default. The patch for this vulnerability is formally released as part of v1.3.0. No known workarounds are available.

Affected products

VendorProductAffectedFixed
nimiq network-libp2p < 1.3.0 —

References