EUVD-2026-91447

Zebra before 4.4.0 contains a consensus divergence vulnerability in V5 transparent signature verification, computing a ZIP-244 digest for SIGHASHSINGLE inputs lacking corresponding outputs instead of failing. Attackers can craft V5 transactions with fewer outputs than inputs that Zebra accepts an...

CVE-2026-104437

The Zebra node (versions before 4.4.0 ) is vulnerable to a consensus divergence vulnerability in V5 transparent signature verification. The root cause is that Zebra computes a ZIP-244 digest for SIGHASH_SINGLE inputs that lack corresponding outputs instead of failing, whereas zcashd correctly rej...

CVE-2026-104436

Zebra versions before 4.5.0 are susceptible to an uncontrolled resource consumption vulnerability. Remote P2P peers can exhaust blocking-pool threads by transmitting oversized block locator vectors, specifically by sending getblocks or getheaders messages containing up to 65,535 locator hashes . ...

CVE-2026-104437 Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missing-Output Handling

Zebra before 4.4.0 contains a consensus divergence vulnerability in V5 transparent signature verification, computing a ZIP-244 digest for SIGHASHSINGLE inputs lacking corresponding outputs instead of failing. Attackers can craft V5 transactions with fewer outputs than inputs that Zebra accepts an...

CVE-2026-104436 Zebra before 4.5.0 CPU Amplification via Uncapped getblocks/getheaders Locator Length

Zebra before 4.5.0 contains an uncontrolled resource consumption vulnerability that allows remote P2P peers to exhaust blocking-pool threads by sending oversized block locator vectors. Attackers can send getblocks or getheaders messages with up to 65,535 locator hashes, triggering per-hash chain...

CVE-2026-104436 Zebra before 4.5.0 CPU Amplification via Uncapped getblocks/getheaders Locator Length

Zebra before 4.5.0 contains an uncontrolled resource consumption vulnerability that allows remote P2P peers to exhaust blocking-pool threads by sending oversized block locator vectors. Attackers can send getblocks or getheaders messages with up to 65,535 locator hashes, triggering per-hash chain...

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...

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,...

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-2026-104434 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-2026-104432 Zebra before 6.3.0 False Readiness via Discarded One-Hash FindBlocks Response

Zebra before 6.3.0 contains an improper exceptional condition check in ChainSync::obtaintips that discards valid one-hash FindBlocks responses, falsely reporting close-to-tip status. Peers returning only the next block hash cause a zero-length sync sample, making the /ready endpoint return 200 OK...

CVE-2026-104432

Zebra versions prior to 6.3.0 are vulnerable to an improper exceptional condition check within the ChainSync::obtain_tips function. This flaw causes the software to discard valid one-hash FindBlocks responses, resulting in the node falsely reporting a close-to-tip status. When peers return only t...

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...

EUVD-2026-91443

Zebra before 6.3.0 contains an improper exceptional condition check in ChainSync::obtaintips that discards valid one-hash FindBlocks responses, falsely reporting close-to-tip status. Peers returning only the next block hash cause a zero-length sync sample, making the /ready endpoint return 200 OK...

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...

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-2026-104431 Zebra before 6.0.0 Denial of Service via Synchronous Script FFI Verification

Zebra before 6.0.0 contains a denial of service vulnerability that allows unauthenticated peers to stall Tokio workers by submitting mempool transactions requiring expensive synchronous script verification. Attackers can send non-standard high-sigop P2SH transactions that reach...

EUVD-2026-91442

Zebra before 6.0.0 contains a denial of service vulnerability that allows unauthenticated peers to stall Tokio workers by submitting mempool transactions requiring expensive synchronous script verification. Attackers can send non-standard high-sigop P2SH transactions that reach...

CVE-2026-104431 Zebra before 6.0.0 Denial of Service via Synchronous Script FFI Verification

Zebra before 6.0.0 contains a denial of service vulnerability that allows unauthenticated peers to stall Tokio workers by submitting mempool transactions requiring expensive synchronous script verification. Attackers can send non-standard high-sigop P2SH transactions that reach...