{"id":"CVE-2026-104426","revision":"f5ecf4d4d9434b228312de8d3da287d3","records":[{"revision":"f5ecf4d4d9434b228312de8d3da287d3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-104426","aliases":[],"title":"Zebra before 6.1.0 Quadratic Complexity DoS via Block Transparent Value Check","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.","state":0,"publishedAt":"2026-10-02T11:38:07.187+00:00","modifiedAt":"2026-10-02T15:18:42.536+00:00","affected":[{"ecosystem":"Vendor product","name":"zebra","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"ZcashFoundation\",\n                    \"product\": \"zebra\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:cargo/zebrad\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"6.1.0\"\n                        },\n                        {\n                            \"version\": \"6.1.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.2,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-4g24-549m-hp75","https://www.vulncheck.com/advisories/zebra-before-6.1.0-quadratic-complexity-dos-via-block-transparent-value-check"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104426","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-104426","identifiers":["CVE-2026-104426"]},"retained":false,"historicalAffected":[]}],"coverage":[]}