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Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC

Type: advisorySources: OSV

ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an address to abort the zebrad process, repeatably keeping the node offline.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-104434
Confirmed fixed CVEs
Not specified
Updated in this feed
2 Nov 2026, 16:31 UTC · Revision 1

Source evidence

Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC

core-osv · Original source

Published 2 Oct 2026, 11:38 UTC

ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an address to abort the zebrad process, repeatably keeping the node offline.

osv:CVE-2026-104434
Complete source record
{
  "id": "7a16b5a1a1de1089d4ee995a7a4da4c9171487bb3fd154448ed1e64e47d87d6b",
  "url": "https://osv.dev/vulnerability/CVE-2026-104434",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC",
    "summary": "ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an address to abort the zebrad process, repeatably keeping the node offline.",
    "evidence": "osv:CVE-2026-104434",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-104434",
      "aliases": [
        "CVE-2026-104434",
        "GHSA-c8w6-x74f-vmg3"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zcashfoundation/zebra",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1440b43ca7df59aca948090d45117557b217a6cd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.5.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.5.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.4.0",
            "v4.4.1",
            "v4.3.1",
            "4.3.1",
            "v4.3.0",
            "v4.2.0",
            "v4.1.0",
            "v4.0.0",
            "v3.1.0",
            "v3.0.0",
            "v3.0.0-rc.0",
            "v2.5.0",
            "v2.0.1",
            "v2.4.2",
            "v2.3.0",
            "v2.4.0",
            "v2.0.0",
            "v2.2.0",
            "v2.1.0",
            "v2.0.0-rc.0",
            "v1.9.0",
            "v1.8.0",
            "v1.7.0",
            "v1.6.1",
            "v1.6.0",
            "v1.5.2",
            "v1.5.1",
            "v1.5.0",
            "v1.4.0",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.0.1",
            "v1.0.0",
            "v1.0.0-rc.9",
            "v1.0.0-rc.8",
            "v1.0.0-rc.7",
            "v1.0.0-rc.6",
            "v1.0.0-rc.5",
            "v1.0.0-rc.0",
            "v1.0.0-rc.4",
            "v1.0.0-rc.3",
            "v1.0.0-rc.2",
            "v1.0.0-rc.1",
            "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-2026-104434.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:20.959567876Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104434.json",
        "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-c8w6-x74f-vmg3",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-104434",
        "https://www.vulncheck.com/advisories/zebra-before-8.0.0-denial-of-service-via-z-listunifiedreceivers-rpc"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-617"
        ],
        "cna_assigner": "VulnCheck",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "8.0.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104434.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-104434",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 487184,
  "published_at": "2026-10-02T11:38:11.845+00:00"
}