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Status published
Unknown
CVE-2025-65548
NUT-14 allows cashu tokens to be created with a preimage...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://delvingbitcoin.org/t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090
- https://github.com/cashubtc/nuts/blob/main/14.md
- https://github.com/cashubtc/nuts/blob/main/07.md
- https://preimage007.github.io/
- 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
- https://bitcointalk.org/index.php?topic=5564329
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Affected Vendor
Affected Software
Unknown
Vulnerable Versions:
Unknown
Timeline
Official Publish:
December 8th, 2025
Last Modified:
December 11th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
No vector data available
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.