CVE-2025-65548
critical · 9.1NUT-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
0.4%
EPSS (exploit prob.)
36th
EPSS percentile
2025-12-08
Published
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-1284
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| cashu | nutshell | < 0.18.0 |
Check a specific version with /api/v1/cve/match.
References
- https://bitcointalk.org/index.php?topic=5564329
- https://delvingbitcoin.org/t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090
- https://github.com/cashubtc/nuts/blob/main/07.md
- https://github.com/cashubtc/nuts/blob/main/14.md
- 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://preimage007.github.io/
- https://bitcointalk.org/index.php?topic=5564329
- 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
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2025-65548