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    4 vulnerabilities found for zebrad by ZcashFoundation

    CVE-2026-40881 (GCVE-0-2026-40881)

    Vulnerability from nvd – Published: 2026-04-21 19:20 – Updated: 2026-04-21 20:36
    VLAI
    Title
    Zebra: addr/addrv2 Deserialization Resource Exhaustion
    Summary
    ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-network version 5.0.1, when deserializing addr or addrv2 messages, which contain vectors of addresses, Zebra would fully deserialize them up to a maximum length (over 233,000) that was derived from the 2 MiB message size limit. This is much larger than the actual limit of 1,000 messages from the specification. Zebra would eventually check that limit but, at that point, the memory for the larger vector was already allocated. An attacker could cause out-of-memory aborts in Zebra by sending multiple such messages over different connections. This vulnerability is fixed in zebrad version 4.3.0 and zebra-network version 5.0.1.
    Severity
    6.3 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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        ],
        "title": "CISA ADP Vulnrichment"
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    ],
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        }
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    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
    7.2 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1025 - Comparison Using Wrong Factors
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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    CVE-2026-40881 (GCVE-0-2026-40881)

    Vulnerability from cvelistv5 – Published: 2026-04-21 19:20 – Updated: 2026-04-21 20:36
    VLAI
    Title
    Zebra: addr/addrv2 Deserialization Resource Exhaustion
    Summary
    ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-network version 5.0.1, when deserializing addr or addrv2 messages, which contain vectors of addresses, Zebra would fully deserialize them up to a maximum length (over 233,000) that was derived from the 2 MiB message size limit. This is much larger than the actual limit of 1,000 messages from the specification. Zebra would eventually check that limit but, at that point, the memory for the larger vector was already allocated. An attacker could cause out-of-memory aborts in Zebra by sending multiple such messages over different connections. This vulnerability is fixed in zebrad version 4.3.0 and zebra-network version 5.0.1.
    Severity
    6.3 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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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
    7.2 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1025 - Comparison Using Wrong Factors
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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