HIGH 8.7 NVD
CVE-2026-123559
Zebra before 7.0.0 contains an inefficient algorithmic complexity vulnerability that allows unauthenticated peers to exhaust verification threads by submitting
Zebra before 7.0.0 contains an inefficient algorithmic complexity vulnerability that allows unauthenticated peers to exhaust verification threads by submitting transactions with many transparent inputs. Attackers can relay invalid transactions with tens of thousands of inputs, forcing quadratic ZIP-244 or ZIP-243 digest recomputation that stalls Rayon-backed block verification for minutes.
References
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-j4cw-58mj-7w6v
- https://www.vulncheck.com/advisories/zebra-before-7.0.0-denial-of-service-via-quadratic-si
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-11-08 via NVD.
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