CVE-2026-123559

7.5 HIGHpublic exploit available

Published 2026-11-08 · Updated 2026-11-08

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CWE-407

Public exploit & PoC references

https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-j4cw-58mj-7w6v

All 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-sighash-computation

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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