BaseFortify

Publication date: 2025-12-08

Last updated on: 2025-12-15

Assigner: MITRE

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-12-08

Last Modified

2025-12-15

Generated

2026-07-06

AI Q&A

2025-12-08

EPSS Evaluated

2026-07-05

NVD

CVE-2025-65548

Affected Vendors & Products

Vendor	Product	Version / Range
cashu	nutshell	to 0.18.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1284	The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

Attack-Flow Graph

Executive Summary

This vulnerability in nutshell (cashubtc/nuts) before version 0.18.0 allows cashu tokens to be created with a preimage hash without validating the size of the preimage when the token is spent. As a result, an attacker can exploit this flaw to store arbitrary data in the mint's database and disk.

Impact Analysis

The vulnerability can be exploited by an attacker to fill the mint's database and disk with arbitrary data, potentially leading to resource exhaustion, degraded performance, or denial of service.

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