CVE-2026-52739

ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a malicious block producer can terminate zebrad by placing the same shielded transaction in a non-finalized parent block and its child. In zebra-state/src/service/nonfinalizedstate/chain.rs, Chain::push originally inserted the...

CVE-2026-52734

ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an unauthenticated P2P peer can cause the mempool download pipeline to retain transactions after verification reaches the outer RATELIMITDELAY timeout. In zebrad/src/components/mempool/downloads.rs, Downloads::pollnext removed...

CVE-2026-52739 ZEBRA: Repeated Non-Finalized Shielded Transaction Aborts Zebra Before Duplicate-Nullifier Rejection

ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a malicious block producer can terminate zebrad by placing the same shielded transaction in a non-finalized parent block and its child. In zebra-state/src/service/nonfinalizedstate/chain.rs, Chain::push originally inserted the...

CVE-2026-52739 ZEBRA: Repeated Non-Finalized Shielded Transaction Aborts Zebra Before Duplicate-Nullifier Rejection

ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a malicious block producer can terminate zebrad by placing the same shielded transaction in a non-finalized parent block and its child. In zebra-state/src/service/nonfinalizedstate/chain.rs, Chain::push originally inserted the...

CVE-2026-52734 ZEBRA: Unbounded memory leak in mempool download pipeline via timeout path cancel_handles retention

ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an unauthenticated P2P peer can cause the mempool download pipeline to retain transactions after verification reaches the outer RATELIMITDELAY timeout. In zebrad/src/components/mempool/downloads.rs, Downloads::pollnext removed...

CVE-2026-54496

CVE-2026-54496 affects Zebrad and related crates (halo2_gadgets, orchard, zcash_primitives, zcashd) prior to fixed versions. Root cause: the variable-base scalar multiplication gadget uses assign_advice() to feed the base point in halo2_gadgets—without a copy constraint tying it to the real base—...

Zebra Address Book Aborted by IPv4-Mapped Mempool Misbehavior Update

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node listens on the default :: address on a Linux host the standard deployment configuration — net.ipv6.bindv6only=0 is the default on all common Linux distributions. 3. Your node is synced near the chain tip...

GHSA-65JJ-FMW8-468Q zebrad has unbounded memory leak in mempool download pipeline via timeout path cancel_handles retention

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections network.listenaddr is set, which is the default. 3. Your node's mempool is active node is synced near the chain tip. All default configurations are affected. Summary The...

zebrad has unbounded memory leak in mempool download pipeline via timeout path cancel_handles retention

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections network.listenaddr is set, which is the default. 3. Your node's mempool is active node is synced near the chain tip. All default configurations are affected. Summary The...

zebrad has persistent on-disk corruption of Sapling/Orchard subtree roots after chain fork via pop_tip

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node participates in a network where chain forks occur mainnet, testnet, or any network with multiple miners. All default configurations are affected. The corruption persists across restarts because it is...

GHSA-2GF8-Q9RR-JQ3H zebrad has persistent on-disk corruption of Sapling/Orchard subtree roots after chain fork via pop_tip

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node participates in a network where chain forks occur mainnet, testnet, or any network with multiple miners. All default configurations are affected. The corruption persists across restarts because it is...

Zebra: Repeated Non-Finalized Shielded Transaction Aborts Zebra Before Duplicate-Nullifier Rejection

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node processes blocks past the checkpoint height non-finalized state is active. 3. The network has NU5 or later activated. All default configurations are affected. Summary Chain::push in the non-finalized sta...

GHSA-GVJC-3W7C-92JX Zebra has sync restart poisoning from single unauthenticated peer via above-lookahead block

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections and is syncing or catching up to the chain tip. Summary A malicious peer can answer Zebra's outbound getblocks/FindBlocks request with a small two-hash inventory, then ser...

GHSA-H72H-PPCX-998P Zebra has pre-handshake buffer capacity reservation based on attacker-claimed body length

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections network.listenaddr is set, which is the default. Summary The P2P codec's Codec::decode method calls src.reservebodylen + HEADERLEN after parsing a 24-byte protocol header,...

zebrad has mempool transaction admission denial via single-peer inbound queue saturation

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections network.listenaddr is set, which is the default. 3. Your node's mempool is active node is synced near the chain tip. All default configurations are affected. Summary A...

GHSA-4FC2-H7JH-287C zebrad has mempool transaction admission denial via single-peer inbound queue saturation

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections network.listenaddr is set, which is the default. 3. Your node's mempool is active node is synced near the chain tip. All default configurations are affected. Summary A...

GHSA-C8W6-X74F-VMG3 zebrad vulnerable to full node denial of service via crafted Sapling receiver in z_listunifiedreceivers

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your zebrad.toml sets rpc.listenaddr to a TCP address RPC server is enabled. 3. An attacker can authenticate to the RPC endpoint. With the default enablecookieauth = true, this requires the attacker to read the...

GHSA-443G-GWGP-49X4 zebrad vulnerable to getblocks/getheaders locator CPU amplification via uncapped vector length

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections. Summary The readgetblocks and readgetheaders codec paths accepted block locator vectors up to approximately 65,535 entries the generic TrustedPreallocate ceiling derived...

zebrad has full node denial of service via non-ASCII LongPollId in getblocktemplate

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your zebrad.toml sets rpc.listenaddr to a TCP address RPC server is enabled. 3. An attacker can authenticate to the RPC endpoint. With the default enablecookieauth = true, this requires the attacker to read the...

GHSA-QV2R-V3MX-F4PF zebrad has full node denial of service via non-ASCII LongPollId in getblocktemplate

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your zebrad.toml sets rpc.listenaddr to a TCP address RPC server is enabled. 3. An attacker can authenticate to the RPC endpoint. With the default enablecookieauth = true, this requires the attacker to read the...