CVE-2026-34063— network-libp2p: Peer can crash the node by opening discovery protocol substream twice
Quick assessment
Affected
nimiq network-libp2p
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Nimiq是Nimiq开源的一个Albatross协议的Rust实现。 Nimiq 1.3.0之前版本存在安全漏洞，该漏洞源于network-libp2p发现使用libp2p ConnectionHandler状态机。该处理程序假设每个连接最多有一个入站和一个出站发现子流。如果远程对等方在同一连接上第二次打开/协商发现协议子流，处理程序会触发panic!，导致网络任务崩溃，使节点的p2p网络离线直至重启。
Possible ATT&CK Techniques 2 AI
T1071 · Application Layer Protocol T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-34063
Vulnerability Information
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Vulnerability Title
network-libp2p: Peer can crash the node by opening discovery protocol substream twice
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5
Vulnerability Title
Nimiq 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nimiq是Nimiq开源的一个Albatross协议的Rust实现。 Nimiq 1.3.0之前版本存在安全漏洞，该漏洞源于network-libp2p发现使用libp2p ConnectionHandler状态机。该处理程序假设每个连接最多有一个入站和一个出站发现子流。如果远程对等方在同一连接上第二次打开/协商发现协议子流，处理程序会触发panic!，导致网络任务崩溃，使节点的p2p网络离线直至重启。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| nimiq | network-libp2p | < 1.3.0 | - |
|
II. Public POCs for CVE-2026-34063
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-34063 (1)
Vendor Advisories for CVE-2026-34063 (1)
Same Patch Batch · nimiq · 2026-04-22 · 8 CVEs total
| CVE-2026-33471 | 9.6 CRITICAL | nimiq-block has skip block quorum bypass via out-of-range BitSet indices & u16 truncation |
| CVE-2026-34065 | 7.5 HIGH | nimiq-primitives: Node crash due to missing interlink validation in election macro block p |
| CVE-2026-34068 | 6.8 MEDIUM | nimiq-transaction: UpdateValidator transactions allows voting key change without proof-of- |
| CVE-2026-34062 | 5.3 MEDIUM | Nimiq has Allocation of Resources Without Limits or Throttling in its libp2p request/respo |
| CVE-2026-34064 | 5.3 MEDIUM | nimiq-account: Vesting insufficient funds error can panic |
| CVE-2026-34066 | 5.3 MEDIUM | nimiq-blockchain: Peer-triggerable panic during history sync |
| CVE-2026-34067 | 3.1 LOW | nimiq-transaction vulnerable to panic via `HistoryTreeProof` length mismatch |
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V. Comments for CVE-2026-34063
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