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Vulnerabilities

Vulnerability · CVE-2026-34063

Nimiq's network-libp2p is a Nimiq network implementation based on libp2p.

Published Apr 22, 2026 · catalog updated Jun 17, 2026 · nimiq proof-of-stake

Check if you run it

No confirmed exploitation is on record for CVE-2026-34063. EPSS is 0.62%. Act only if a listed version of nimiq proof-of-stake is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.62%
Remediation
Advisory link
Affected products
cpe nimiq/nimiq proof-of-stake

Nimiq's network-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, discovery uses a libp2p 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 / 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe nimiq/nimiq proof-of-stakeversion unspecified

How to fix CVE-2026-34063

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-34063. EPSS is 0.62%. Act only if a listed version of nimiq proof-of-stake is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-617. EPSS 0.62%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 22, 2026 · NIST NVD

    Detected

    Nimiq's network-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, discovery uses a libp2p 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 / path instead of failing closed. This

  2. Jun 17, 2026 · NIST NVD

    Updated

    Nimiq's network-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, discovery uses a libp2p 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 / path instead of failing closed. This

Sources

  • CVE.orgVulnerability recordCVE-2026-34063

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-34063

    30-day exploitation probability 0.6%

    first.org
  • NIST NVDVulnerability recordCVE-2026-34063

    Nimiq's network-libp2p is a Nimiq network implementation based on libp2p. Prior to version 1.3.0, discovery uses a libp2p state machine. the handler assumes there is at most one inbound and one outbound discovery substream per connection. if a

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.