What is CVE-2026-44500?

CVE-2026-44500 is a medium-severity vulnerability in Zcashfoundation Zebra, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-05-08.

How severe is CVE-2026-44500?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Resource exhaustion in Zcashfoundation Zebra

CVE-2026-44500

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.4.0, prior to zebra-chain version 7.0.0, and prior to zebra-network version 6.0.0, several inbound deserialization paths in Zebra allocated buffers sized against gen…

EPSS: 0.000 (5.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Zcashfoundation Zebra — versions zebrad < 4.4.0, zebra-chain < 7.0.0, zebra-network < 6.0.0
Zfnd Zebra-chain
Zfnd Zebrad
Zfnd Zebra-network

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-438q-jx8f-cccv (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44500?: CVE-2026-44500 is a medium-severity vulnerability in Zcashfoundation Zebra, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-05-08.
How severe is CVE-2026-44500?: Medium severity. CVSS v3 base score is 5.3 out of 10.