{"id":"CVE-2026-104426","published":"2026-10-02T12:17:12.887","lastModified":"2026-10-02T17:59:09.430","description":"Zebra before 6.1.0 contains an inefficient algorithmic complexity vulnerability in remaining_transaction_value that clones the entire block-level spent-UTXO map per transaction during contextual verification. Attackers can mine or seed the mempool with roughly 26,000 minimal single-input transactions in one block, stalling every validating node for over 52 seconds.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-407"],"vendors":[],"products":[],"references":[{"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-4g24-549m-hp75","tags":[]},{"url":"https://www.vulncheck.com/advisories/zebra-before-6.1.0-quadratic-complexity-dos-via-block-transparent-value-check","tags":[]}],"exploitRefs":[{"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-4g24-549m-hp75","tags":[]}],"hasPoc":true,"ai":null}