CVE-2026-44500

The record

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.4.0, prior to zebra-chain version 7.0.0, and prior to zebra-network version 6.0.0, several inbound deserialization paths in Zebra allocated buffers sized against generic transport or block-size ceilings before the tighter protocol or consensus limits were enforced. An unauthenticated or post-handshake peer could therefore force the node to preallocate and parse for orders of magnitude more data than the protocol intended, across headers messages, equihash solutions in block headers, Sapling spend vectors in V5/V4 transactions, and coinbase script bytes in blocks. This issue has been patched in zebrad version 4.4.0, zebra-chain version 7.0.0, and zebra-network version 6.0.0.

Affected packages

Related vulnerabilities

• GHSA-438q-jx8f-cccv Zebra Vulnerable to Allocation Amplification in Inbound Network Deserializers Same vulnerability
• CVE-2026-41584 ZEBRA is a Zcash node written entirely in Rust. Also affects zebra-chain
• GHSA-452v-w3gx-72wg Zebra has rk Identity Point Panic in Transaction Verification Also affects zebra-chain
• CVE-2026-34202 ZEBRA is a Zcash node written entirely in Rust. Also affects zebra-chain
• GHSA-qp6f-w4r3-h8wg Zebra node crash — V5 transaction hash panic (P2P reachable) Also affects zebra-chain
• CVE-2026-40881 ZEBRA is a Zcash node written entirely in Rust. Also affects zebra-network
• GHSA-xr93-pcq3-pxf8 Zebra: addr/addrv2 Deserialization Resource Exhaustion Also affects zebra-network
• GHSA-h9hm-m2xj-4rq9 Zebra has Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning Also affects zebrad