What’s Vulnerable › Vulnerabilities

CVE-2026-104434: Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-02 · updated 2026-10-02
• Weakness: CWE-617

Description

ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an address to abort the zebrad process, repeatably keeping the node offline.

Affected products

• ZcashFoundation zebra: before 8.0.0; before 4.5.0 — fixed in 4.5.0, 8.0.0

How to fix

Upgrade to a fixed version: ZcashFoundation zebra 4.5.0, 8.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-c8w6-x74f-vmg3
• https://www.vulncheck.com/advisories/zebra-before-8.0.0-denial-of-service-via-z-listunifiedreceivers-rpc

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