Resource exhaustion in Zcashfoundation Zebrad
CVE-2026-40881
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 maxim…
EPSS: 0.003 (17.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Zcashfoundation Zebrad — versions < 4.3.1
- Zcashfoundation Zebra-network — versions < 5.0.1
- Zfnd Zebrad
- Zfnd Zebra-network
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-40881?
- CVE-2026-40881 is a high-severity vulnerability in Zcashfoundation Zebrad, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-04-21.
- How severe is CVE-2026-40881?
- High severity. CVSS v3 base score is 7.5 out of 10.