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cpe:2.3:a:nimiq:nimiq-block:*:*:*:*:*:*:*:*

part: a version: * update: *

VendorNimiq (a6c6d398-2780-5e77-a82f-ca37478d870d)
ProductNimiq Block (02d9877f-0e90-5c76-b208-8b373a1b2cb4)
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NotesImported from gcve-enriched-dumps CVE data

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Vulnerability references

IdentifiercpeApplicabilitySubmitteddb.gcve.eu detailsRationale
CVE:CVE-2026-33471 vulnerable 2026-06-08 07:59:10.144357 nimiq-block has skip block quorum bypass via out-of-range BitSet indices & u16 truncation
CRITICAL (9.6)
nimiq-block contains block primitives to be used in Nimiq's Rust implementation. `SkipBlockProof::verify` computes its quorum check using `BitSet.len()`, then iterates `BitSet` indices and casts each `usize` index to `u16` (`slot as u16`) for slot lookup. Prior to version 1.3.0, if an attacker can get a `SkipBlockProof` verified where `MultiSignature.signers` contains out-of-range indices spaced by 65536, these indices inflate `len()` but collide onto the same in-range `u16` slot during aggregation. This makes it possible for a malicious validator with far fewer than `2f+1` 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.
Published: 2026-04-22T19:13:04.687Z
Updated: 2026-04-23T14:15:20.570Z
Reference links
Imported from gcve-enriched-dumps CVE data

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