CVEvulnerability
CVE-2025-65548
9.1 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2025-12-08
- Last modified
- 2026-10-18
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weaknesses
- CWE-1284
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.
Affected configurations
• cashu nutshell (< 0.18.0)
Related
Weakness · CWE (1)
- CWE-1284 Improper Validation of Specified Quantity in Input weakness
References
- https://bitcointalk.org/index.php?topic=5564329 Exploit, Issue 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 Exploit, Third Party Advisory
- https://github.com/cashubtc/nuts/blob/main/14.md Exploit, Third Party Advisory
- 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 Exploit, Third Party Advisory
- https://preimage007.github.io/ Product
- https://bitcointalk.org/index.php?topic=5564329 Exploit, Issue Tracking
- 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 Exploit, Third Party Advisory