← Vulnerability feed

Vulnerability record · CVE-2025-65548 · published 8 December 2025

CVE-2025-65548: Cashu nutshell vulnerability

Cashu · Nutshell

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.

9.1 CVSS 3.1 Critical EPSS 0.42% · top 66.6% CWE-1284 · CWE-1284
9.1CVSS 3.1 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 6 tagged exploit
17 Jun 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bitcointalk.org/index.php?topic=5564329 ExploitIssue Tracking
https://delvingbitcoin.org/t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090 Broken Link
https://github.com/cashubtc/nuts/blob/main/07.md ExploitThird Party Advisory
https://github.com/cashubtc/nuts/blob/main/14.md ExploitThird Party Advisory
https://github.com/jamesob/delving-bitcoin-archive/blob/master/archive/rendered-topics/2025-11-November/2025-11-02-publi ExploitThird Party Advisory
https://preimage007.github.io/ Product
https://bitcointalk.org/index.php?topic=5564329 ExploitIssue Tracking
https://github.com/jamesob/delving-bitcoin-archive/blob/master/archive/rendered-topics/2025-11-November/2025-11-02-publi ExploitThird Party Advisory

Track CVE-2025-65548 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2010-3904Linux Kernel RDS rds_page_copy_user Improper Input Validation Privilege EscalationThe rds_page_copy_user function in net/rds/page.c in the Linux kernel before 2.6.36 fails to properly validate addresses obtained from user space. A …KEVEPSS 14%analysed9.8CVE-2022-20699Cisco Small Business RV Series Routers Stack Buffer OverflowCisco Small Business RV160, RV260, RV340 and RV345 series routers contain a stack-based buffer overflow (CWE-121) that can be triggered remotely with…KEVEPSS 72%analysed

Source: NIST National Vulnerability Database (record CVE-2025-65548), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.