CVE-2026-58262 Klever-Go: PubKeysBitmap padding bits bypass the BLS signature quorum

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, header signature verification counts the unused padding bits of the PubKeysBitmap toward the two-thirds validator quorum. These padding bits do not correspond to any validator and are ignored by the actual BLS...

CVE-2026-58262 Klever-Go: PubKeysBitmap padding bits bypass the BLS signature quorum

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, header signature verification counts the unused padding bits of the PubKeysBitmap toward the two-thirds validator quorum. These padding bits do not correspond to any validator and are ignored by the actual BLS...

CVE-2026-58262 Klever-Go: PubKeysBitmap padding bits bypass the BLS signature quorum

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, header signature verification counts the unused padding bits of the PubKeysBitmap toward the two-thirds validator quorum. These padding bits do not correspond to any validator and are ignored by the actual BLS...

PT-2026-69155

Name of the Vulnerable Software and Affected Versions Klever-Go versions prior to 1.7.20 Description Header signature verification incorrectly counts unused padding bits of the PubKeysBitmap toward the two-thirds validator quorum. Because these padding bits do not correspond to any validator and...

CVE-2026-58262: Insufficient Verification of Data Authenticity

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, header signature verification counts the unused padding bits of the PubKeysBitmap toward the two-thirds validator quorum. These padding bits do not correspond to any validator and are ignored by the actual BLS...

nimiq-block has skip block quorum bypass via out-of-range BitSet indices & u16 truncation

Impact 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. If an attacker can get a SkipBlockProof verified where MultiSignature.signers contains out-of-range indices spaced by 65536, these...

GHSA-6973-8887-87FF nimiq-block has skip block quorum bypass via out-of-range BitSet indices & u16 truncation

Impact 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. If an attacker can get a SkipBlockProof verified where MultiSignature.signers contains out-of-range indices spaced by 65536, these...

CVE-2026-33471 nimiq-block has skip block quorum bypass via out-of-range BitSet indices & u16 truncation

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...

CVE-2026-33471 nimiq-block has skip block quorum bypass via out-of-range BitSet indices & u16 truncation

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...

CVE-2026-33471

CVE-2026-33471 affects nim i q/core-rs-albatross (Rust Nimiq PoS) prior to v1.3.0. The vulnerability arises in SkipBlockProof::verify, which checks quorum using BitSet.len() and then casts each index (slot as u16) for lookup. Attackers can craft a SkipBlockProof where out-of-range indices spaced ...