Vulnerability · CVE-2026-33471
nimiq-block contains block primitives to be used in Nimiq's Rust implementation.
Published Apr 22, 2026 · corrected/updated Jun 17, 2026 · nimiq nimiq proof-of-stake · evidence confidence high
nimiq-block contains block primitives to be used in Nimiq's Rust implementation. computes its quorum check using , then iterates indices and casts each index to ( ) for slot lookup. Prior to version 1.3.0, if an attacker can get a verified where contains out-of-range indices spaced by 65536, these indices inflate but collide onto the same in-range slot during aggregation. This makes it possible for a malicious validator with far fewer than real signer slots to pass skip block proof verification by multiplying a single BLS signature by the same factor. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-33471 is a critical public vulnerability record for nimiq nimiq proof-of-stake. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether nimiq nimiq proof-of-stake is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: nimiq/nimiq proof-of-stake. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 9.6, EPSS 0.3%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-1284, CWE-190, CWE-20, CWE-345. Sources contributing to this record: cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Apr 22, 2026 · NIST NVD
Detected
nimiq-block contains block primitives to be used in Nimiq's Rust implementation. computes its quorum check using , then iterates indices and casts each index to ( ) for slot lookup. Prior to version 1.3.0, if an attacker can get a verified where contains out-of-range indices spaced by 65536, these indices inflate but collide onto the same in-range slot during aggregation. This makes it possible fo
Jun 17, 2026 · NIST NVD
Updated
nimiq-block contains block primitives to be used in Nimiq's Rust implementation. computes its quorum check using , then iterates indices and casts each index to ( ) for slot lookup. Prior to version 1.3.0, if an attacker can get a verified where contains out-of-range indices spaced by 65536, these indices inflate but collide onto the same in-range slot during aggregation. This makes it possible fo
Affected
- cpe nimiq/nimiq proof-of-stakeversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-33471
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-33471
30-day exploitation probability 0.3%
first.org - NIST NVDVulnerability recordCVE-2026-33471
nimiq-block contains block primitives to be used in Nimiq's Rust implementation. computes its quorum check using , then iterates indices and casts each index to ( ) for slot lookup. Prior to version 1.3.0,
nvd.nist.gov