{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34202", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-26T15:57:52.323Z", "datePublished": "2026-03-31T14:02:56.454Z", "dateUpdated": "2026-03-31T17:17:30.860Z"}, "containers": {"cna": {"title": "Zebra node crash \u2014 V5 transaction hash panic (P2P reachable)", "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"}]}], "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"}}], "references": [{"name": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg"}, {"name": "https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0"}, {"name": "https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements", "tags": ["x_refsource_MISC"], "url": "https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements"}], "affected": [{"vendor": "ZcashFoundation", "product": "zebra", "versions": [{"version": "< 4.3.0", "status": "affected"}]}, {"vendor": "ZcashFoundation", "product": "zebra-chain", "versions": [{"version": "< 6.0.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-31T14:02:56.454Z"}, "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."}], "source": {"advisory": "GHSA-qp6f-w4r3-h8wg", "discovery": "UNKNOWN"}}, "adp": [{"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"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-31T17:17:30.860Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-34202", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-31T17:16:55.754237Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-31T17:17:26.784Z"}}], "cna": {"title": "Zebra node crash \u2014 V5 transaction hash panic (P2P reachable)", "source": {"advisory": "GHSA-qp6f-w4r3-h8wg", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 9.2, "attackVector": "NETWORK", "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", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE"}}], "affected": [{"vendor": "ZcashFoundation", "product": "zebra", "versions": [{"status": "affected", "version": "< 4.3.0"}]}, {"vendor": "ZcashFoundation", "product": "zebra-chain", "versions": [{"status": "affected", "version": "< 6.0.1"}]}], "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"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1336", "description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-94", "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-31T14:02:56.454Z"}}}, "cveMetadata": {"cveId": "CVE-2026-34202", "state": "PUBLISHED", "dateUpdated": "2026-03-31T17:17:30.860Z", "dateReserved": "2026-03-26T15:57:52.323Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-03-31T14:02:56.454Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:zfnd:zebra:*:*:*:*:*:rust:*:*", "matchCriteriaId": "4B93957D-63A6-4232-8046-FDF593752C05", "versionEndExcluding": "4.3.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:zfnd:zebra-chain:*:*:*:*:*:rust:*:*", "matchCriteriaId": "5B11D020-A19F-4A46-B359-7325300738F2", "versionEndExcluding": "6.0.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}], "id": "CVE-2026-34202", "lastModified": "2026-04-07T21:02:10.667", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.2, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-31T15:16:17.860", "references": [{"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-1336"}], "source": "security-advisories@github.com", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-502"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.3.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "zebra", "source": "cna", "vendor": "ZcashFoundation"}, "product": "zebra", "vendor": "zcashfoundation"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.0.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "zebra-chain", "source": "cna", "vendor": "ZcashFoundation"}, "product": "zebra-chain", "vendor": "zcashfoundation"}], "analysis": {"en": {"generated_at": "2026-04-07T23:39:45.613288+00:00", "value": {"mitigation_remediation": ["Apply the zebra v4.3.0 or zebra-chain v6.0.1 update and restart the node"], "summary": {"action": "Immediate patch", "impact": "Node crash causing denial of service"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Zcash Foundation\u2019s Zebra node and Zebra-chain software versions prior to zebrad 4.3.0 and zebra-chain 6.0.1. Only these older releases are impacted; newer releases incorporate the fix.", "description_and_impact": "A remote unauthenticated attacker can crash a Zebra node by sending a specially crafted V5 transaction that passes initial deserialization but fails during transaction ID calculation, forcing a panic in the transaction processing logic. This results in a denial of service, disrupting the node\u2019s availability for a participant in the Zcash network.", "risk_and_exploitability": "The CVSS score of 9.2 indicates high severity, while the EPSS score of less than 1% suggests a low probability of widespread exploitation. The issue is not listed in the CISA KEV catalog. The attack vector is P2P reachable, meaning a remote attacker can trigger the crash by sending the crafted transaction over the network, without any authentication."}}}}, "created": "2026-03-31T19:54:35.988050+00:00", "updated": "2026-04-08T20:00:20.435595+00:00", "vendors": ["zcashfoundation", "zcashfoundation$PRODUCT$zebra", "zcashfoundation$PRODUCT$zebra-chain"]}