CVE-2026-104437

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 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-2026-104437 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-2026-104437

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-2026-104437 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-2026-104424 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 shape templates into oversized blocks,...

CVE-2026-104424 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 shape templates into oversized blocks,...

CVE-2026-104437: Improper Verification of Cryptographic Signature

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-2026-52731 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/longpoll.rs, LongPollId::fromstr...

EUVD-2026-61169

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/longpoll.rs, LongPollId::fromstr...

CVE-2026-52731

ZEBRA (Zcash full node, Rust) versions prior to 4.5.0 are vulnerable to a denial of service via the getblocktemplate RPC endpoint. The LongPollId::from_str function in zebra-rpc/src/methods/types/long_poll.rs performs byte-index string slicing on user-supplied input. When the LongPollId contains ...

CVE-2026-52731 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/longpoll.rs, LongPollId::fromstr...

CVE-2026-52731 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/longpoll.rs, LongPollId::fromstr...

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...

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...

PT-2026-55414

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

PT-2026-55467

Name of the Vulnerable Software and Affected Versions ZEBRA versions prior to 4.5.0 Description An authenticated attacker can terminate the zebrad node process by sending a malformed request to an enabled RPC endpoint. The getblocktemplate handler panics when parsing a LongPollId parameter...

PT-2026-104247

Name of the Vulnerable Software and Affected Versions Zebra versions prior to 4.4.0 Description A consensus divergence issue exists in V5 transparent signature verification. The software incorrectly computes a ZIP-244 digest for SIGHASH SINGLE inputs that lack corresponding outputs instead of...