CVE-2025-65548CRITICAL 9.1EPSS p27.5%
CVE-2025-65548CVE-2025-65548
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.
Scoring
| CVSS 3.1 | 9.1 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| EPSS | 0.36% probability of exploitation · percentile 27.5% · 2026-06-19T12:03:05Z |
| Published | 2025-12-08 |
| Last modified | 2025-12-15 |
Underlying weaknesses· 1
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
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Improper Validation of Specified Quantity in Inputcwe-1284 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.