rotki before 1.44.2 Weak Key Derivation for Premium Cloud Backup Encryption

{
  "id": "f300f6e2f4e5d2f5c66c44b43d6a33b106424fc3b7683c7fc7e31adf3940feaf",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-116071",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "rotki before 1.44.2 Weak Key Derivation for Premium Cloud Backup Encryption",
    "summary": "rotki before 1.44.2 contains a weak key derivation vulnerability that allows attackers to brute-force backups because the premium sync key is a single unsalted SHA-256 of the user password. Attackers who obtain an uploaded backup blob can run GPU-parallel offline password guessing and decrypt the database containing exchange API keys, secrets, wallet addresses and transaction history.",
    "evidence": "cve:CVE-2026-116071",
    "products": [
      {
        "name": {
          "value": "rotki",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-116071",
      "aliases": [
        "CVE-2026-116071"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 8.2,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH"
          }
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 5.9,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "integrityImpact": "NONE",
            "userInteraction": "NONE",
            "attackComplexity": "HIGH",
            "availabilityImpact": "NONE",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "HIGH"
          }
        }
      ],
      "affected": [
        {
          "vendor": "rotki",
          "product": "rotki",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.44.2",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-25T11:50:59.252Z",
      "provider": "cve",
      "references": [
        "https://github.com/rotki/rotki/issues/13393",
        "https://github.com/rotki/rotki",
        "https://github.com/rotki/rotki/pull/13401",
        "https://github.com/rotki/rotki/blob/v1.44.1/rotkehlchen/crypto.py#L17-L45",
        "https://github.com/rotki/rotki/blob/v1.44.1/rotkehlchen/data_handler.py#L263-L294",
        "https://github.com/rotki/rotki/releases/tag/v1.44.2",
        "https://www.vulncheck.com/advisories/rotki-before-1.44.2-weak-key-derivation-for-premium-cloud-backup-encryption"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-25T11:50:59.252Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116071",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 136265,
  "published_at": "2026-10-25T11:50:59.252+00:00"
}