CVE-2026-34062Network attack vector

Service interruption via stalled partial-frame streams

Published Apr 22, 2026 · Updated Apr 22, 2026

Resource exhaustion in Nimiq nimiq-network-libp2p before 1.3.0 allows remote attackers to interrupt node service via partial frames. MessageCodec::read_request and read_response call read_to_end on inbound substreams before validating the declared length, so incomplete frames retain stream slots. Unauthenticated peers can hold many such streams open, and Behaviour::new raises the concurrent-stream limit to 1,000, reducing capacity for legitimate traffic.

CVSS severity5.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Nimiq nimiq-network-libp2p before 1.3.0 allows remote attackers to interrupt node service via partial frames. MessageCodec::read_request and read_response call read_to_end on inbound substreams before validating the declared length, so incomplete frames retain stream slots. Unauthenticated peers can hold many such streams open, and Behaviour::new raises the concurrent-stream limit to 1,000, reducing capacity for legitimate traffic.

The record

CVE
CVE-2026-34062
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
Nimiq
Product
nimiq-network-libp2p
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nimiq · nimiq-network-libp2pversion=< 1.3.0

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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