Vendor
ZcashFoundation
52 known vulnerabilities.
ZcashFoundation at a glance
- Last 12 months
- 51
- Critical · all time
- 7
- Exploited · all time
- 0
- Public exploit · all time
- 0
Show as table
| Month | Vulnerabilities | Critical |
|---|---|---|
| Nov 2026 | 7 | 0 |
| Oct 2026 | 22 | 0 |
| Sep 2026 | 0 | 0 |
| Aug 2026 | 10 | 1 |
| Jul 2026 | 1 | 1 |
| Jun 2026 | 0 | 0 |
| May 2026 | 7 | 4 |
| Apr 2026 | 2 | 0 |
| Mar 2026 | 2 | 1 |
| Feb 2026 | 0 | 0 |
| Jan 2026 | 0 | 0 |
| Dec 2025 | 0 | 0 |
| Nov 2025 | 0 | 0 |
| Oct 2025 | 0 | 0 |
| Sep 2025 | 1 | 0 |
| Aug 2025 | 0 | 0 |
| Jul 2025 | 0 | 0 |
| Jun 2025 | 0 | 0 |
| May 2025 | 0 | 0 |
| Apr 2025 | 0 | 0 |
| Mar 2025 | 0 | 0 |
| Feb 2025 | 0 | 0 |
| Jan 2025 | 0 | 0 |
| Dec 2024 | 0 | 0 |
Products
52 results · Feed
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High 7.5
Zebra before 7.0.0 Sync Denial of Service via Forged Checkpoint Block Body
Zebra before 7.0.0 contains an incomplete cleanup vulnerability that allows unauthenticated peers to stall initial sync by serving a forged checkpoint block body. Attackers can supply a body with forged authorizing data near the final checkpoint, leaving reje…
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High 7.5
Zebra before 7.0.0 Denial of Service via Quadratic Sighash Computation
Zebra before 7.0.0 contains an inefficient algorithmic complexity vulnerability that allows unauthenticated peers to exhaust verification threads by submitting transactions with many transparent inputs. Attackers can relay invalid transactions with tens of th…
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High 7.5
Zebra before 7.0.0 Checkpoint Sync Denial of Service via Cancelled Verifier Rewind
Zebra zebrad before 7.0.0 contains a denial of service vulnerability that allows a malicious peer to stall checkpoint sync by cancelling the verifier rewind after a failed commit. Attackers can serve a forged block with altered authorizing data plus a restart…
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Medium 5.9
Zebra zebrad before 7.0.0 Reachable Assertion DoS via Peer Disconnection
ZcashFoundation Zebra zebrad before 7.0.0 contains a reachable assertion race condition that allows unauthenticated remote peers to abort the node by triggering disconnection during a blocked outbound send. Malicious peers can return empty FindBlocks or FindH…
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Medium 5.3
Zebra 4.5.0 before 7.0.0 Honest Peer Ban via Mempool Lock-Time Scoring
ZcashFoundation Zebra from 4.5.0 before 7.0.0 contains a protection mechanism failure that bans honest peers by scoring mempool lock-time rejections at the ban threshold. Attackers can broadcast transactions locked until the current height right after each bl…
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High 7.5
Zebra 2.3.0 before 7.0.0 Denial of Service via Unscored Script Verification Failures
Zebra from 2.3.0 before 7.0.0 contains a denial of service vulnerability that allows unauthenticated peers to evade misbehavior scoring by sending transactions or blocks with invalid transparent scripts. Attackers can flood mempool with script-failing transac…
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High 7.5
Zebra zebrad 6.4.0 before 7.0.0 Denial of Service via Mempool Coinbase-Maturity Check
Zebra zebrad 6.4.0 before 7.0.0 performs quadratic work in the mempool coinbase-maturity check because Transaction::coinbase_spend_restriction() rebuilds the transaction's output list once per spent outpoint. Any connected peer can repeatedly send unsigned tr…
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Low 3.7
Zebra before 6.4.0 Gossiped Block Drop via Forged Coinbase scriptSig Height
Zebra before 6.4.0 contains an improper integrity validation vulnerability in the inbound gossip download path that allows unauthenticated peers to force dropping of new blocks without penalty. Attackers can serve a real block with a coinbase scriptSig rewrit…
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Low 3.7
Zebra before 6.4.0 Denial of Service via Same-Hash Forged Block Bodies
Zebra before 6.4.0 contains an uncontrolled resource consumption vulnerability that allows unauthenticated peers to force full proof verification by serving forged block bodies with valid header hashes. Attackers can flip authorizing-only bytes such as a coin…
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Medium 5.3
Zebra 2.3.0 before 6.4.0 Peer Ban Bypass via Exact-IP Keying
Zebra 2.3.0 before 6.4.0 contains a protection mechanism failure that allows unauthenticated peers to evade bans because bans and misbehavior scores are keyed on exact IP addresses. Attackers can reconnect from fresh IPv6 addresses in their /64 allocation or …
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High 7.5
Zebra 6.4.0 before 6.4.2 Denial of Service via Malformed v6 Transaction
ZcashFoundation Zebra 6.4.0 before 6.4.2 parses version 6 transactions carrying a pre-NU6.3 consensus branch ID, but the size computation during UnminedTx construction treats re-serialization of the Orchard bundle as infallible, so the resulting error trips a…
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High 7.4
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 SIGHASH_SINGLE inputs lacking corresponding outputs instead of failing. Attackers can craft V5 transactions with fewer ou…
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Low 3.7
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 loca…
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High 7.4
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 SIGHASH_SINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that…
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Medium 6.5
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 z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Aut…
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Medium 5.3
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::obtain_tips 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, m…
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High 7.5
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 tran…
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Medium 5.3
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…
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High 7.5
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 OP_1 through OP_16 as 20 sigops and causing a consensus divergence. Remote a…
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Medium 5.3
Zebra before 11.0.0 Denial of Service via getblock Verbosity 2
The getblock RPC method in zebra-rpc before 11.0.0, used by the Zcash Foundation's Zebra node, panics on verbosity 2 for a side-chain block because the block's -1 confirmations sentinel is converted to u32 with .expect(), aborting the process. Remote unauthen…
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Medium 5.9
Zebra before 6.1.0 Quadratic Complexity DoS via Block Transparent Value Check
Zebra before 6.1.0 contains an inefficient algorithmic complexity vulnerability in remaining_transaction_value that clones the entire block-level spent-UTXO map per transaction during contextual verification. Attackers can mine or seed the mempool with roughl…
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Medium 5.9
Zebra before 6.1.0 Chain Stall via Stale parent_error_map Entry
Zebra before 6.1.0 contains an incomplete cleanup vulnerability in the state write task that allows remote unauthenticated peers to stall node synchronization by poisoning parent_error_map. Attackers can deliver a coinbase-malleated block sharing a canonical …
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Medium 5.3
Zebra before 6.1.0 Batch-Verification Poisoning DoS via Unattributed Pushed Transactions
ZcashFoundation Zebra before 6.1.0 contains a resource exhaustion vulnerability that allows unauthenticated peers to degrade block processing by pushing transactions with invalid Orchard proofs without being misbehavior-scored. Attackers can repeatedly push i…
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High 7.5
Zebra before 6.2.1 Denial of Service via Uncapped V6 Shielded Proof Verification
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 Halo…
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Low 3.7
Zebra before 6.1.0 Incorrect Block Size Calculation in getblocktemplate
Zebra before 6.1.0 contains an incorrect calculation vulnerability in its ZIP-317 block template selector that omits header and transaction-count size from the block budget. Attackers can place valid selectable transactions in a victim miner's mempool to shap…
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High 7.5
Zebra before 6.3.0 Block Sync Denial of Service via Coinbase scriptSig Rewrite
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 trans…
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Medium 5.3
Zebra before 6.2.1 Block Download Denial of Service via KnownBlock SentHashes Lockout
Zebra before 6.2.1 contains an incomplete cleanup vulnerability that allows unauthenticated peers to block downloading of valid blocks by leaving rejected hashes in SentHashes. Attackers can send a contextually invalid block sharing an honest block's header h…
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Medium 4.8
Zebra before 6.3.0 Honest Peer Banning via Far-Ahead FindBlocks Hashes
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 c…
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Medium 5.3
Zebra before 6.3.0 Peer Misbehavior Ban Bypass via Gossiped Blocks
Zebra before 6.3.0 contains a protection mechanism failure that allows unauthenticated peers to evade misbehavior scoring by supplying invalid gossiped blocks. The inbound cleanup step wrongly downcasts RouterError to VerifyBlockError and discards the score, …
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High 7.5
ZEBRA: IPv4-Mapped Mempool Misbehavior Update Aborts Zebra Address Book
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an unauthenticated IPv4 peer can deterministically terminate a synced Zebra node using the default Linux dual-stack listener configuration. The handshake path canonicalized an IPv4-mapped IPv6 Pe…
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High 8.7
ZEBRA: Block suppression via NU5 same-header body poisoning of sent-hash cache
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a remote unauthenticated P2P peer can stall a Zebra node by racing an invalid block body against the valid canonical body for the same block header hash. ZIP-244 permits the attacker to mutate co…
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Medium 5.3
ZEBRA: Mempool transaction admission denial via single-peer inbound queue saturation
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, one unauthenticated P2P peer can monopolize all 25 MAX_INBOUND_CONCURRENCY slots in Zebra's inbound mempool download and verification pipeline. In zebrad/src/components/mempool/downloads.rs, the …
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Medium 6.5
ZEBRA: Full node denial of service via non-ASCII LongPollId in getblocktemplate
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an attacker authenticated to an enabled Zebra RPC endpoint can terminate zebrad by supplying a getblocktemplate LongPollId containing multi-byte UTF-8 characters. In zebra-rpc/src/methods/types/l…
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Medium 6.5
ZEBRA: Persistent on-disk corruption of Sapling/Orchard subtree roots after chain fork via pop_tip
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a natural or attacker-influenced chain fork can leave stale Sapling and Orchard note-commitment subtree roots in Zebra state. In zebra-state/src/service/non_finalized_state/chain.rs, Chain::pop_t…
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Medium 6.9
ZEBRA: Finalized address balance credit-first overflow on consensus-valid blocks
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a consensus-valid block containing a long chain of transparent self-spends to one address can permanently halt Zebra nodes. In zebra-state/src/service/finalized_state/zebra_db/transparent.rs, the…
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Critical 9.3
ZEBRA: Consensus divergence via P2SH sigop undercount in pure-Rust disabled-opcode parser
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, Zebra can accept a block that zcashd rejects because the P2SH signature-operation counter undercounts redeem scripts containing a disabled opcode followed by signature opcodes. In zebra-script/sr…
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Medium 5.9
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/non_finalized_state/chain.rs, Ch…
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Medium 5.3
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 RATE_LIMIT_DELAY timeout. In zebrad/src/components/mempool/download…
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Medium 5.3
ZEBRA: Sync restart poisoning from single unauthenticated peer via above-lookahead block
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a malicious unauthenticated P2P peer can answer Zebra's outbound getblocks or FindBlocks request with a small two-hash inventory and then serve a syntactically valid block whose coinbase height i…
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Critical 9.3
Missing copy constraint in halo2_gadgets variable-base scalar multiplication allows under-constrained base, breaking Orchard Action circuit soundness
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad 5.0.0, halo2_gadgets 0.5.0, orchard 0.14.0, zcash_primitives 0.28.0, and zcashd 6.20.0, the variable-base scalar multiplication gadget in halo2_gadgets/src/ecc/chip/mul/incomplete.rs used assign_…