Vulnerability in Zcashfoundation Zebra
CVE-2026-41584
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-chain version 6.0.2, Orchard transactions contain a rk field which is a randomized validating key and also an elliptic curve point. The Zcash specification allows the field to be the identity (a "zero" value), however, the orchard crate which is used to verify Orchard proofs would panic when fed a rk with the identity value. Thus an attacker could send a crafted transaction that would make a Zebra node crash. This issue has been patched in zebrad version 4.3.1 and zebra-chain version 6.0.2.
EPSS: 0.003 (18.7th 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 Zebra — versions zebra-chain < 6.0.2, zebrad < 4.3.1
- Zfnd Zebra-chain
- Zfnd Zebrad
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-41584?
- CVE-2026-41584 is a high-severity vulnerability in Zcashfoundation Zebra, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2026-05-08.
- How severe is CVE-2026-41584?
- High severity. CVSS v3 base score is 7.5 out of 10.