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CVE-2026-46545 nimiq CVE debrief

CVE-2026-46545 is a high-severity remote denial-of-service vulnerability in the Nimiq Proof-of-Stake protocol. A remote, unauthenticated attacker can exploit a vulnerability in MerkleRadixTrie::put_chunk to crash any node performing state synchronization. This issue was patched in version 1.5.0.

Vendor
nimiq
Product
core-rs-albatross
CVSS
HIGH 7.5
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 Nimiq Proof-of-Stake protocol, specifically those running versions prior to 1.5.0, should apply the patch to prevent exploitation.

Technical summary

The vulnerability, tracked as CVE-2026-46545, affects the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. A remote, unauthenticated denial-of-service vulnerability in MerkleRadixTrie::put_chunk allows any state-sync peer to crash any node performing state synchronization. The CVSS score for this vulnerability is 7.5, indicating a high severity.

Defensive priority

High

Recommended defensive actions

  • Apply the patch by updating to version 1.5.0 or later.
  • Review and implement security best practices for node synchronization and authentication.

Evidence notes

The vulnerability was patched in version 1.5.0. For more information, refer to resourceLinkAnnotations with id 'ref-5' and 'ref-6'.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46545 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46545

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

  • CVE-2026-46545 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46545

    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.