Critical severity9.1OSV Advisory· Published Dec 8, 2025· Updated Jun 17, 2026
CVE-2025-65548
CVE-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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3Patches
Vulnerability mechanics
References
6- bitcointalk.org/index.phpnvdExploitIssue Tracking
- github.com/cashubtc/nuts/blob/main/07.mdnvdExploitThird Party Advisory
- github.com/cashubtc/nuts/blob/main/14.mdnvdExploitThird Party Advisory
- 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.mdnvdExploitThird Party Advisory
- delvingbitcoin.org/t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090nvdBroken Link
- preimage007.github.ionvdProduct
News mentions
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