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2 vulnerabilities found for zebra-network 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
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version
ZcashFoundation zebrad Affected: < 4.3.1
Create a notification for this product.
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
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version
ZcashFoundation zebrad Affected: < 4.3.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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