{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:zfnd:zebrad:*:*:*:*:*:rust:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.4.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "589d64b9b7ea6ab4c32ecab41ba6b74f26907940"
            }
          ],
          "repo": "https://github.com/zcashfoundation/zebra",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-jv4h-j224-23cc"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-682"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44498.json"
  },
  "details": "ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit (MAX_BLOCK_SIGOPS), allowing it to accept blocks that zcashd rejects with bad-blk-sigops. A miner who produces such a block can split the network: Zebra nodes follow the offending chain while zcashd nodes do not. This issue has been patched in version 4.4.0.",
  "id": "CVE-2026-44498",
  "modified": "2026-07-15T01:48:54.548023071Z",
  "published": "2026-05-08T15:09:09.919Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ZcashFoundation/zebra/releases/tag/v4.4.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44498.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-jv4h-j224-23cc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44498"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "ZEBRA: Block Validator Undercounts Coinbase and P2SH Sigops"
}