CVE-2026-104435

Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASHSINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that Zebra accepts but zcashd rejects,...

CVE-2026-104429

Zebra zebrad 5.0.0 before 6.0.0-rc.0 does not apply its per-peer mempool admission cap to transactions received as direct P2P tx messages, because these are queued without the sending peer recorded as their source. A remote inbound peer can push many unique transactions to occupy a disproportiona...

CVE-2026-104434

ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the zlistunifiedreceivers RPC handler, which calls expect on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an...

CVE-2026-104422

The block sync download path in Zebra zebrad before 6.3.0 reads a block's height from its unvalidated coinbase scriptSig and drops blocks that appear too far behind the tip before consensus validation, without penalizing the supplying peer. Because V5 transaction IDs exclude the scriptSig, a...

CVE-2026-104423

Zebra zebrad before 6.2.1 contains an asymmetric resource consumption vulnerability that allows unauthenticated peers to stall block verification by pushing V6 mempool transactions with invalid Halo2 proofs. Attackers can flood the shared unprioritized Halo2 verification queue with zero-fee...

CVE-2026-104419

Zebra zebrad 4.5.0 before 6.3.0 discards which peer supplied the block hashes in FindBlocks responses, then assigns 100 misbehavior points, the ban threshold, to whichever peer serves a requested block more than 50,000 heights above the tip. A remote peer can return real far-ahead hashes to a...

CVE-2026-104435 Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Without Output

Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASHSINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that Zebra accepts but zcashd rejects,...

CVE-2026-104435

Zebra zebrad 4.4.0 and zebra-script 6.0.0 are vulnerable to a consensus rule enforcement failure. The software fails to correctly apply the ZIP-244 consensus rule , specifically by accepting V5 transparent inputs signed with SIGHASH_SINGLE that do not have a corresponding output. This flaw allows...

EUVD-2026-91445

Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASHSINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that Zebra accepts but zcashd rejects,...

CVE-2026-104435 Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Without Output

Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASHSINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that Zebra accepts but zcashd rejects,...

CVE-2026-104435 Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Without Output

Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASHSINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that Zebra accepts but zcashd rejects,...

CVE-2026-104434

ZcashFoundation Zebra software is affected by a reachability assertion in the z_listunifiedreceivers RPC handler. The vulnerability exists in zebra-rpc versions before 8.0.0 and zebrad versions before 4.5.0 . The issue occurs because the expect() function fails during Sapling receiver parsing whe...

EUVD-2026-91444

ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the zlistunifiedreceivers RPC handler, which calls expect on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an...

CVE-2026-104434 Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC

ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the zlistunifiedreceivers RPC handler, which calls expect on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an...

CVE-2026-104434 Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC

ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the zlistunifiedreceivers RPC handler, which calls expect on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an...

CVE-2026-104434 Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC

ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the zlistunifiedreceivers RPC handler, which calls expect on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an...

CVE-2026-104430 Zebra 4.5.0 Consensus Split via P2SH Sigop Overcount

Zebra zebrad 4.5.0 and zebra-script 7.0.0 count P2SH redeem script signature operations in legacy mode rather than zcashd's accurate P2SH mode, overcounting CHECKMULTISIG preceded by OP1 through OP16 as 20 sigops and causing a consensus divergence. Remote attackers can broadcast P2SH spends using...

CVE-2026-104430

The software zebra zebrad 4.5.0 and zebra-script 7.0.0 contains a vulnerability where P2SH redeem script signature operations are counted in legacy mode instead of the accurate P2SH mode used by zcashd . This causes CHECKMULTISIG preceded by OP_1 through OP_16 to be overcounted as 20 sigops, lead...

CVE-2026-104429 Zebra before 6.0.0-rc.0 Per-Peer Mempool Admission Bypass via P2P tx Messages

Zebra zebrad 5.0.0 before 6.0.0-rc.0 does not apply its per-peer mempool admission cap to transactions received as direct P2P tx messages, because these are queued without the sending peer recorded as their source. A remote inbound peer can push many unique transactions to occupy a disproportiona...

CVE-2026-104429 Zebra before 6.0.0-rc.0 Per-Peer Mempool Admission Bypass via P2P tx Messages

Zebra zebrad 5.0.0 before 6.0.0-rc.0 does not apply its per-peer mempool admission cap to transactions received as direct P2P tx messages, because these are queued without the sending peer recorded as their source. A remote inbound peer can push many unique transactions to occupy a disproportiona...