Critical
Zebra node crash — V5 transaction hash panic (P2P reachable)
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-34202
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 18:29 UTC · Revision 1
Source evidence
Zebra node crash — V5 transaction hash panic (P2P reachable)
core-osv · Original sourcePublished 31 Mar 2026, 14:02 UTC
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.
osv:CVE-2026-34202
Complete source record
{
"id": "c7ae67c0e1a795818f54c4b738162f12f71b6533d9c0c1d9af4994918ad91926",
"url": "https://osv.dev/vulnerability/CVE-2026-34202",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Zebra node crash — V5 transaction hash panic (P2P reachable)",
"summary": "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.",
"evidence": "osv:CVE-2026-34202",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-34202",
"aliases": [
"CVE-2026-34202",
"GHSA-qp6f-w4r3-h8wg"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/zcashfoundation/zebra",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "92a4e55f9e702468dbb0d8ec57df3e0c3fdd4ea9"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "4.3.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "92a4e55f9e702468dbb0d8ec57df3e0c3fdd4ea9"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v4.3.0"
},
{
"cpe": "cpe:2.3:a:zfnd:zebra:*:*:*:*:*:rust:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.3.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"v4.1.0",
"v4.0.0",
"v3.1.0",
"v3.0.0",
"v3.0.0-rc.0",
"v2.5.0",
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"v2.3.0",
"v2.4.0",
"v2.0.0",
"v2.2.0",
"v2.1.0",
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"v1.9.0",
"v1.8.0",
"v1.7.0",
"v1.6.1",
"v1.6.0",
"v1.5.2",
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"v1.3.0",
"v1.2.0",
"v1.1.0",
"v1.0.1",
"v1.0.0",
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"v1.0.0-beta.15",
"v1.0.0-beta.14",
"v1.0.0-beta.13",
"v1.0.0-beta.12",
"v1.0.0-beta.11",
"v1.0.0-beta.10",
"v1.0.0-beta.9",
"v1.0.0-beta.8",
"v1.0.0-beta.7",
"v1.0.0-beta.6",
"v1.0.0-beta.5",
"v1.0.0-beta.4",
"v1.0.0-beta.3",
"v1.0.0-beta.2",
"v1.0.0-beta.1",
"v1.0.0-beta.0",
"v1.0.0-alpha.19",
"v1.0.0-alpha.18",
"v1.0.0-alpha.17",
"v1.0.0-alpha.16",
"v1.0.0-alpha.15",
"v1.0.0-alpha.14",
"v1.0.0-alpha.13",
"v1.0.0-alpha.12",
"v1.0.0-alpha.11",
"v1.0.0-alpha.10",
"v1.0.0-alpha.9",
"v1.0.0-alpha.8",
"v1.0.0-alpha.7",
"v1.0.0-alpha.6",
"v1.0.0-alpha.5",
"v1.0.0-alpha.4",
"v1.0.0-alpha.3",
"v1.0.0-alpha.2",
"v1.0.0-alpha.1",
"v1.0.0-alpha.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34202.json"
}
}
],
"modified": "2026-10-28T02:30:38.190635168Z",
"provider": "osv",
"references": [
"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",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34202.json",
"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg",
"https://nvd.nist.gov/vuln/detail/CVE-2026-34202"
],
"provider_metadata": {
"cwe_ids": [
"CWE-1336",
"CWE-94"
],
"cna_assigner": "GitHub_M",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"fixed": "6.0.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34202.json"
}
},
"related_cves": [
{
"value": "CVE-2026-34202",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 505704,
"published_at": "2026-03-31T14:02:56.454+00:00"
}