{"id":"CVE-2026-104428","state":"PUBLISHED","title":"Zebra before 11.0.0 Denial of Service via getblock Verbosity 2","description":"The getblock RPC method in zebra-rpc before 11.0.0, used by the Zcash Foundation's Zebra node, panics on verbosity 2 for a side-chain block because the block's -1 confirmations sentinel is converted to u32 with .expect(), aborting the process. Remote unauthenticated attackers, directly or through lightwalletd, can repeat this call to keep the node in a crash loop.","publishedAt":"2026-10-02T11:38:08.558Z","updatedAt":"2026-10-06T02:40:55.553Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["ZcashFoundation zebra"],"affected":[{"vendor":"ZcashFoundation","product":"zebra","packageURL":"pkg:cargo/zebra-rpc","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"11.0.0","versionType":"semver"},{"version":"11.0.0","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-x6v8-c2xp-928m","https://www.vulncheck.com/advisories/zebra-before-11.0.0-denial-of-service-via-getblock-verbosity-2"],"weaknesses":["CWE-617"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/104xxx/CVE-2026-104428.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-104428","state":"PUBLISHED","datePublished":"2026-10-02T11:38:08.558Z","dateUpdated":"2026-10-06T02:40:55.553Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-02T00:46:23.831Z"},"containers":{"cna":{"title":"Zebra before 11.0.0 Denial of Service via getblock Verbosity 2","descriptions":[{"lang":"en","value":"The getblock RPC method in zebra-rpc before 11.0.0, used by the Zcash Foundation's Zebra node, panics on verbosity 2 for a side-chain block because the block's -1 confirmations sentinel is converted to u32 with .expect(), aborting the process. 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