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CVE-2026-34062— Nimiq has Allocation of Resources Without Limits or Throttling in its libp2p request/response

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nimiq-libp2p中MessageCodec::read_request和read_response在入站子流上调用read_to_end，因此远程对等方可以仅发送部分帧并保持子流打开。由于Behaviour::new还设置了with_max_concurrent_streams(1000)，节点暴露的停滞槽预算远大于库默认值。

CVSS 5.3 · Medium EPSS 0.30% · P22
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I. Basic Information for CVE-2026-34062

Vulnerability Information
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Vulnerability Title
Nimiq has Allocation of Resources Without Limits or Throttling in its libp2p request/response
Source: CVE Program / CVE List V5
Vulnerability 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.
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:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
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nimiq-libp2p中MessageCodec::read_request和read_response在入站子流上调用read_to_end，因此远程对等方可以仅发送部分帧并保持子流打开。由于Behaviour::new还设置了with_max_concurrent_streams(1000)，节点暴露的停滞槽预算远大于库默认值。
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-2026-34062

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III. Intelligence Information for CVE-2026-34062

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Patches & Fixes for CVE-2026-34062 (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-2026-34063 7.5 HIGH network-libp2p: Peer can crash the node by opening discovery protocol substream twice
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-2026-34064 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

IV. Related Vulnerabilities

Same product: network-libp2p
Same vendor: nimiq
Same weakness: CWE-770

V. Comments for CVE-2026-34062

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