CVE-2026-34063

HIGH EPSS 27.1%
Published Apr 22, 20262mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Apr 22, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
27.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-617

Affected Products 1

VendorProductVersionRange
nimiqnimiq_proof-of-stake* <1.3.0

References 4

  • github.com https://github.com/nimiq/core-rs-albatross/commit/e0d4e01994f061bf41d3c2835bc74040d3c084f5
    Patch
  • github.com https://github.com/nimiq/core-rs-albatross/pull/3666
    Issue TrackingPatch
  • github.com https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0
    Release Notes
  • github.com https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-74hp-mhfx-m45h
    PatchVendor Advisory

Remediation

  • github.com https://github.com/nimiq/core-rs-albatross/commit/e0d4e01994f061bf41d3c2835bc74040d3c084f5
    Patch
  • github.com https://github.com/nimiq/core-rs-albatross/pull/3666
    Issue TrackingPatch
  • github.com https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-74hp-mhfx-m45h
    PatchVendor Advisory