Trezor Safe improper security check in on-device display

{
  "id": "4d76825175cf864582c8804e7102f38ae31aea620febd1859f7e3dac14bfbe60",
  "url": "https://osv.dev/vulnerability/CVE-2026-65058",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Trezor Safe improper security check in on-device display",
    "summary": "Trezor Safe 3, Safe 5, and Safe 7 firmware contains a confirmation-binding flaw in the Ethereum sign_tx / sign_tx_eip1559 flow. For contract interactions, the device confirms only the initial calldata chunk while the signature commits to the full streamed calldata. An attacker could present calldata to a victim then supply a different tail that changes the signed transaction. Fixed in 70c9b0c.",
    "evidence": "osv:CVE-2026-65058",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-65058",
      "aliases": [
        "CVE-2026-65058"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/trezor/trezor-firmware",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "70c9b0c07748"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "70c9b0c07748"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65058.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.317487611Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65058.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-65058",
        "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-202-02.json",
        "https://www.cve.org/CVERecord?id=CVE-2026-65058",
        "https://github.com/trezor/trezor-firmware/commit/70c9b0c07748"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-358"
        ],
        "cna_assigner": "cisa-cg",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "70c9b0c"
                  },
                  {
                    "fixed": "70c9b0c"
                  },
                  {
                    "fixed": "70c9b0c"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65058.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-65058",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522221,
  "published_at": "2026-07-21T20:13:00.56+00:00"
}