CVE-2025-65548 (GCVE-0-2025-65548)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:00 – Updated: 2025-12-08 18:07
VLAI?
Summary
NUT-14 allows cashu tokens to be created with a preimage hash. However, nutshell (cashubtc/nuts) before 0.18.0 do not validate the size of preimage when the token is spent. The preimage is stored by the mint and attacker can exploit this vulnerability to fill the mint's db nd disk with arbitrary data.
Severity ?
No CVSS data available.
CWE
  • n/a
Assigner
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "NUT-14 allows cashu tokens to be created with a preimage hash. However, nutshell (cashubtc/nuts) before 0.18.0 do not validate the size of preimage when the token is spent. The preimage is stored by the mint and attacker can exploit this vulnerability to fill the mint\u0027s db nd disk with arbitrary data."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-08T18:07:49.838Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://delvingbitcoin.org/t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090"
        },
        {
          "url": "https://github.com/cashubtc/nuts/blob/main/14.md"
        },
        {
          "url": "https://github.com/cashubtc/nuts/blob/main/07.md"
        },
        {
          "url": "https://preimage007.github.io/"
        },
        {
          "url": "https://github.com/jamesob/delving-bitcoin-archive/blob/master/archive/rendered-topics/2025-11-November/2025-11-02-public-disclosure-denial-of-service-using-htlc-in-cashu-id2090.md"
        },
        {
          "url": "https://bitcointalk.org/index.php?topic=5564329"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2025-65548",
    "datePublished": "2025-12-08T00:00:00.000Z",
    "dateReserved": "2025-11-18T00:00:00.000Z",
    "dateUpdated": "2025-12-08T18:07:49.838Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-65548\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2025-12-08T19:15:50.677\",\"lastModified\":\"2025-12-09T18:37:33.427\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"NUT-14 allows cashu tokens to be created with a preimage hash. However, nutshell (cashubtc/nuts) before 0.18.0 do not validate the size of preimage when the token is spent. The preimage is stored by the mint and attacker can exploit this vulnerability to fill the mint\u0027s db nd disk with arbitrary data.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://bitcointalk.org/index.php?topic=5564329\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://delvingbitcoin.org/t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://github.com/cashubtc/nuts/blob/main/07.md\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://github.com/cashubtc/nuts/blob/main/14.md\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://github.com/jamesob/delving-bitcoin-archive/blob/master/archive/rendered-topics/2025-11-November/2025-11-02-public-disclosure-denial-of-service-using-htlc-in-cashu-id2090.md\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://preimage007.github.io/\",\"source\":\"cve@mitre.org\"}]}}"
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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