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The Zcash Foundation releases Zebra 4.4.0, fixing multiple critical consensus security vulnerabilities
Golden Finance reports that on May 3rd, the Zcash Foundation released Zebra 4.4.0.
It states that this version includes fixes for multiple security vulnerabilities, especially addressing several critical consensus issues, and strongly recommends all node operators upgrade immediately.
Fixes include: resolving a potential denial-of-service vulnerability that could cause nodes to permanently stop discovering new blocks; correcting an issue with insufficient sigops counting in block validators (involving coinbase and P2SH), which could have caused Zebra to accept blocks rejected by zcashd; fixing a consensus split caused by inadequate handling of FFI bridge errors in transparent sighash; and addressing memory amplification risks in inbound network deserialization.
Additionally, this version implements resource limits on the indexer gRPC server and RPC request body size, adds an nTx field in getblock responses to report transaction count, and updates the librustzcash dependency stack to address the RUSTSEC-2026-0105 security risk.