Description
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.
INFO
Published Date :
2026-04-22T19:13:04.687Z
Last Modified :
2026-04-23T14:15:20.570Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-33471 vulnerability.
| Vendors | Products |
|---|---|
| Nimiq |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33471.
