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.
History

Mon, 15 Dec 2025 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Cashu
Cashu nutshell
CPEs cpe:2.3:a:cashubtc:nutshell:*:*:*:*:*:*:*:* cpe:2.3:a:cashu:nutshell:*:*:*:*:*:*:*:*
Vendors & Products Cashu
Cashu nutshell

Fri, 12 Dec 2025 15:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:cashubtc:nutshell:*:*:*:*:*:*:*:*

Thu, 11 Dec 2025 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1284
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 09 Dec 2025 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Cashubtc
Cashubtc nutshell
Vendors & Products Cashubtc
Cashubtc nutshell

Mon, 08 Dec 2025 18:30:00 +0000

Type Values Removed Values Added
Description 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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2025-12-08T00:00:00.000Z

Updated: 2025-12-11T14:36:58.193Z

Reserved: 2025-11-18T00:00:00.000Z

Link: CVE-2025-65548

cve-icon Vulnrichment

Updated: 2025-12-09T20:03:57.625Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-08T19:15:50.677

Modified: 2025-12-15T15:56:44.717

Link: CVE-2025-65548

cve-icon Redhat

No data.