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2 vulnerabilities found for zebrad by ZcashFoundation

CVE-2026-40881 (GCVE-0-2026-40881)
Vulnerability from cvelistv5
Published
2026-04-21 19:20
Modified
2026-04-21 20:36
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
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
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.
References
Impacted products
Vendor Product Version
ZcashFoundation zebrad Version: < 4.3.1
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CVE-2026-40880 (GCVE-0-2026-40880)
Vulnerability from cvelistv5
Published
2026-04-21 19:18
Modified
2026-04-21 19:52
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
CWE
  • CWE-1025 - Comparison Using Wrong Factors
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.
References
Impacted products
Vendor Product Version
ZcashFoundation zebrad Version: < 4.3.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

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