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medium advisory

Zebra Block Validator Sigops Undercount Vulnerability

Zebra's block validator undercounts signature operations, allowing it to accept invalid blocks, leading to a network split between Zebra and zcashd nodes.

zebra blockchain consensus-failure zcash
2r
medium advisory

Mezo L1 Bridge Vulnerability Leads to Potential ERC-20 Drain

A vulnerability in the Mezo bridge allows for the potential full drain of the L1 bridge without changing the bridged balance on Mezo due to a stale StateDB overwrite, enabling a malicious user to steal ERC-20 tokens locked in the L1 bridge.

MezoBridge blockchain smart-contract bridge state-overwrite
3r 2t
high advisory

Nimiq Blockchain Timestamp Manipulation Vulnerability

A vulnerability in nimiq-blockchain versions 1.3.0 and earlier allows malicious validators to manipulate block timestamps, leading to inflation of the monetary supply.

blockchain timestamp-manipulation inflation
2r 4t 1c
high advisory

BSV Ruby SDK Improper ARC Response Handling

BSV Ruby SDK versions before 0.8.2 improperly handle ARC responses, treating certain failure statuses as successful broadcasts, potentially tricking applications into trusting unaccepted transactions; version 0.8.2 resolves this vulnerability.

bsv ruby blockchain vulnerability
2r 1t 1c
critical advisory

Zebra Consensus Split Vulnerability Due to SIGHASH_SINGLE Handling

Zebra and zcashd disagree on a consensus rule for V5+ transparent spends related to SIGHASH_SINGLE handling when the input index has no corresponding output, leading to a consensus split where Zebra accepts invalid blocks rejected by zcashd.

Zebra +2 consensus vulnerability blockchain
2r
medium advisory

Nimiq Block Skip Block Quorum Bypass Vulnerability

A vulnerability exists in Nimiq Block's SkipBlockProof verification process, allowing attackers to bypass quorum checks by manipulating MultiSignature signers with out-of-range indices, potentially compromising blockchain integrity, and affecting rust/nimiq-block versions 0.2.0 and earlier.

nimiq-block blockchain quorum bypass nimiq rust
2r 1t