{"schema":"threatline.record/2","record":{"id":"CVE-2026-104427","aliases":["GHSA-8gxx-hc65-vv82"],"summary":"Zebra before 6.1.0 Chain Stall via Stale parent_error_map Entry","details":"Zebra before 6.1.0 contains an incomplete cleanup vulnerability in the state write task that allows remote unauthenticated peers to stall node synchronization by poisoning parent_error_map. Attackers can deliver a coinbase-malleated block sharing a canonical block's hash before it propagates, causing the next canonical block to be rejected and stalling the node for roughly 2,000 blocks.","categories":["Unclassified"],"product":"zebra","vendor":"ZcashFoundation","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104427","source_modified_at":"2026-10-05T14:53:45.275Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"zebra","vendor":"ZcashFoundation","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"6.1.0"},{"version":"6.1.0","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104427","source_modified_at":"2026-10-05T14:53:45.275Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"zebra","ecosystem":null},"version":"6.1.0","basis":"first unaffected version stated in the CVE record"}],"cvss":8.2,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00308,"percentile":0.22423,"score_date":"2026-10-23"},"published_at":"2026-10-02T11:38:07.777Z","modified_at":"2026-10-05T14:53:45.275Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-104427","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-05T14:53:45.275Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-104427","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-8gxx-hc65-vv82","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/zebra-before-6.1.0-chain-stall-via-stale-parent-error-map-entry","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-05T14:53:37.615214Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-05T14:53:45.275Z","content_hash":"45e243fdcd77ce2953a9c3aeae559f53968d8f99301e67fd8b9982077c8578a3"}}