CVE-2025-65548
- Source
- https://cve.org/CVERecord?id=CVE-2025-65548
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-65548.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-65548
- Published
- 2025-12-08T19:15:50.677Z
- Modified
- 2026-01-09T19:16:07.566595Z
- Severity
-
- 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://delvingbitcoin.org/t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090
- https://preimage007.github.io/
- 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://bitcointalk.org/index.php?topic=5564329
Affected packages
Git / github.com/cashubtc/nutshell
Affected ranges
- Type
- GIT
- Repo
- https://github.com/cashubtc/nutshell
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed