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4 vulnerabilities found for zebra-consensus by zfnd
CVE-2026-40880 (GCVE-0-2026-40880)
Vulnerability from nvd – Published: 2026-04-21 19:18 – Updated: 2026-04-21 19:52
VLAI
Title
Zebra: Cached Mempool Verification Bypasses Consensus Rules for Ahead-of-Tip Blocks
Summary
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 but invalid for H+2 and then mining that transaction in a block at height H+2, a miner could cause vulnerable Zebra nodes to accept an invalid block, leading to a consensus split from the rest of the Zcash network. This vulnerability is fixed in zebrad version 4.3.1 and zebra-consensus version 5.0.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1025 - Comparison Using Wrong Factors
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ZcashFoundation/zebra/security… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| ZcashFoundation | zebrad |
Affected:
< 4.3.1
|
|
| ZcashFoundation | zebra-consensus |
Affected:
< 5.0.2
|
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CVE-2026-34377 (GCVE-0-2026-34377)
Vulnerability from nvd – Published: 2026-03-31 14:05 – Updated: 2026-03-31 17:18
VLAI
Title
Zebra has a Consensus Failure due to Improper Verification of V5 Transactions
Summary
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-consensus version 5.0.1, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By matching a valid transaction's txid while providing invalid authorization data, a miner could cause vulnerable Zebra nodes to accept an invalid block, leading to a consensus split from the rest of the Zcash network. This would not allow invalid transactions to be accepted but could result in a consensus split between vulnerable Zebra nodes and invulnerable Zebra and Zcashd nodes. This issue has been patched in zebrad version 4.3.0 and zebra-consensus version 5.0.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ZcashFoundation/zebra/security… | x_refsource_CONFIRM |
| https://github.com/ZcashFoundation/zebra/releases… | x_refsource_MISC |
| https://zfnd.org/zebra-4-3-0-critical-security-fi… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| ZcashFoundation | zebra |
Affected:
< 4.3.0
|
|
| ZcashFoundation | zebra-consensus |
Affected:
< 5.0.1
|
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CVE-2026-40880 (GCVE-0-2026-40880)
Vulnerability from cvelistv5 – Published: 2026-04-21 19:18 – Updated: 2026-04-21 19:52
VLAI
Title
Zebra: Cached Mempool Verification Bypasses Consensus Rules for Ahead-of-Tip Blocks
Summary
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 but invalid for H+2 and then mining that transaction in a block at height H+2, a miner could cause vulnerable Zebra nodes to accept an invalid block, leading to a consensus split from the rest of the Zcash network. This vulnerability is fixed in zebrad version 4.3.1 and zebra-consensus version 5.0.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1025 - Comparison Using Wrong Factors
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ZcashFoundation/zebra/security… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| ZcashFoundation | zebrad |
Affected:
< 4.3.1
|
|
| ZcashFoundation | zebra-consensus |
Affected:
< 5.0.2
|
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CVE-2026-34377 (GCVE-0-2026-34377)
Vulnerability from cvelistv5 – Published: 2026-03-31 14:05 – Updated: 2026-03-31 17:18
VLAI
Title
Zebra has a Consensus Failure due to Improper Verification of V5 Transactions
Summary
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-consensus version 5.0.1, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By matching a valid transaction's txid while providing invalid authorization data, a miner could cause vulnerable Zebra nodes to accept an invalid block, leading to a consensus split from the rest of the Zcash network. This would not allow invalid transactions to be accepted but could result in a consensus split between vulnerable Zebra nodes and invulnerable Zebra and Zcashd nodes. This issue has been patched in zebrad version 4.3.0 and zebra-consensus version 5.0.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ZcashFoundation/zebra/security… | x_refsource_CONFIRM |
| https://github.com/ZcashFoundation/zebra/releases… | x_refsource_MISC |
| https://zfnd.org/zebra-4-3-0-critical-security-fi… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| ZcashFoundation | zebra |
Affected:
< 4.3.0
|
|
| ZcashFoundation | zebra-consensus |
Affected:
< 5.0.1
|
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