GHSA-63WG-WJJJ-7CP8 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-HHM7-QRV5-H4R6 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-W834-CF6P-9M9W Zebra: Finalized address balance credit-first overflow on consensus-valid blocks

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node processes blocks on any Zcash network. Summary The finalized transparent address balance writer processes all newly-created outputs credits before processing spent outputs debits within the same block. A...

GHSA-GF9R-M956-97QX zebrad has consensus divergence via P2SH sigop undercount in pure-Rust disabled-opcode parser

Am I affected You are affected if: 1. You run any version of zebrad up to and including v4.4.1. 2. Your node validates blocks on mainnet, testnet, or any network where both Zebra and zcashd nodes participate. All default configurations are affected. No feature flags, non-default settings, or...

GHSA-4M69-67M6-PRQP Zebra has block suppression via NU5 same-header body poisoning of sent-hash cache

Description Am I affected You are affected if: 1. You run any version of 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 processes blocks past the checkpoint height non-finalized state is active. All...

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,...

CVE-2026-44500

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...

CVE-2026-41583

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-script version 5.0.2, after a refactoring, Zebra failed to validate a consensus rule that restricted the possible values of sighash hash types for V5 transactions which were enabled in the NU5 network...

CVE-2026-41584

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-chain version 6.0.2, Orchard transactions contain a rk field which is a randomized validating key and also an elliptic curve point. The Zcash specification allows the field to be the identity a "zero"...

CVE-2026-40880

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and zebra-consensus version 5.0.2, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By carefully submitting a transaction that is valid for height H+1 bu...

CVE-2026-44497

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.4.0 and prior to zebra-script version 6.0.0, the fix for CVE-2026-41583 introduced a separate issue due to insufficient error handling of the case where the sighash type is invalid, during sighash computation. Instead of...

CVE-2026-44499

ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, a composite denial-of-service vulnerability in Zebra's block discovery pipeline allows an unauthenticated remote attacker to permanently halt all new block discovery on a targeted node. The attack exploits three independent...

CVE-2026-44498

ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit MAXBLOCKSIGOPS, allowing it to accept blocks that zcashd rejects with bad-blk-sigops. A miner who produces such a block...

EUVD-2026-28801

Zebra has Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning...

GHSA-H9HM-M2XJ-4RQ9 Zebra has Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning

Summary A composite denial-of-service vulnerability in Zebra's block discovery pipeline allows an unauthenticated remote attacker to permanently halt all new block discovery on a targeted node. The attack exploits three independent weaknesses in the gossip, syncer, and download subsystems — all...

GHSA-PVMV-CWG8-V6C8 Zebra v4.4.0 still accepts V5 SIGHASH_SINGLE without a corresponding output

Consensus Divergence in V5 Transparent SIGHASHSINGLE With No Corresponding Output Summary Zebra failed to enforce a ZIP-244 consensus rule for V5 transparent transactions: when an input is signed with SIGHASHSINGLE and there is no transparent output at the same index as that input, validation mus...

CVE-2026-44499

ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, a composite denial-of-service vulnerability in Zebra's block discovery pipeline allows an unauthenticated remote attacker to permanently halt all new block discovery on a targeted node. The attack exploits three independent...

CVE-2026-44500

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...

CVE-2026-44498

ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit MAXBLOCKSIGOPS, allowing it to accept blocks that zcashd rejects with bad-blk-sigops. A miner who produces such a block...

CVE-2026-41584

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-chain version 6.0.2, Orchard transactions contain a rk field which is a randomized validating key and also an elliptic curve point. The Zcash specification allows the field to be the identity a "zero"...