{"id":"CVE-2026-34202","state":"PUBLISHED","title":"Zebra node crash — V5 transaction hash panic (P2P reachable)","description":"ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-chain version 6.0.1, a vulnerability in Zebra's transaction processing logic allows a remote, unauthenticated attacker to cause a Zebra node to panic (crash). This is triggered by sending a specially crafted V5 transaction that passes initial deserialization but fails during transaction ID calculation. This issue has been patched in zebrad version 4.3.0 and zebra-chain version 6.0.1.","publishedAt":"2026-03-31T14:02:56.454Z","updatedAt":"2026-03-31T17:17:30.860Z","severity":{"score":9.2,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["ZcashFoundation zebra","ZcashFoundation zebra-chain"],"affected":[{"vendor":"ZcashFoundation","product":"zebra","versions":[{"version":"< 4.3.0","status":"affected"}]},{"vendor":"ZcashFoundation","product":"zebra-chain","versions":[{"version":"< 6.0.1","status":"affected"}]}],"references":["https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg","https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0","https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements"],"weaknesses":["CWE-1336","CWE-94"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34202.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34202","state":"PUBLISHED","datePublished":"2026-03-31T14:02:56.454Z","dateUpdated":"2026-03-31T17:17:30.860Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-26T15:57:52.323Z"},"containers":{"cna":{"title":"Zebra node crash — V5 transaction hash panic (P2P reachable)","descriptions":[{"lang":"en","value":"ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-chain version 6.0.1, a vulnerability in Zebra's transaction processing logic allows a remote, unauthenticated attacker to cause a Zebra node to panic (crash). This is triggered by sending a specially crafted V5 transaction that passes initial deserialization but fails during transaction ID calculation. This issue has been patched in zebrad version 4.3.0 and zebra-chain version 6.0.1."}],"affected":[{"vendor":"ZcashFoundation","product":"zebra","versions":[{"version":"< 4.3.0","status":"affected"}]},{"vendor":"ZcashFoundation","product":"zebra-chain","versions":[{"version":"< 6.0.1","status":"affected"}]}],"references":[{"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg","name":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0","name":"https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0","tags":["x_refsource_MISC"]},{"url":"https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements","name":"https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"HIGH","baseScore":9.2,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1336","lang":"en","description":"CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-31T14:02:56.454Z"},"source":{"advisory":"GHSA-qp6f-w4r3-h8wg","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-31T17:16:55.754237Z","id":"CVE-2026-34202","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-31T17:17:30.860Z"}}]}}}