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PatchSiren cyber security CVE debrief

CVE-2026-44505 nimiq CVE debrief

A vulnerability was discovered in the Nimiq Proof-of-Stake protocol, specifically in the network-libp2p module. The handle_dht_get function in network-libp2p/src/swarm.rs did not properly handle verifier errors when a peer returns a FoundRecord. This can cause the oneshot used by Network::dht_get to hang indefinitely, leading to a denial-of-service (DoS) condition. The vulnerability has been patched in version 1.4.0.

Vendor
nimiq
Product
core-rs-albatross
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-10
Advisory published
2026-06-10
Advisory updated
2026-06-10

Who should care

Users of the Nimiq Proof-of-Stake protocol, specifically those using versions prior to 1.4.0, should be aware of this vulnerability and take steps to upgrade to the patched version.

Technical summary

The vulnerability is caused by the handle_dht_get function not properly handling verifier errors when a peer returns a FoundRecord. This can cause the oneshot used by Network::dht_get to hang indefinitely. The CVSS score for this vulnerability is 5.3, with a severity of MEDIUM.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade to version 1.4.0 or later of the Nimiq Proof-of-Stake protocol.
  • Review and update any affected systems or applications using the Nimiq protocol.

Evidence notes

The vulnerability was discovered and patched by the Nimiq team. The CVE record was published on June 10, 2026.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44505 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44505

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-44505 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44505

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.