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.

Weakness classification

• CWE-1284: Improper Validation of Specified Quantity in Input

Primary references

• cve@mitre.org — Exploit, Issue Tracking
• cve@mitre.org — Broken Link
• cve@mitre.org — Exploit, Third Party Advisory
• cve@mitre.org — Exploit, Third Party Advisory
• cve@mitre.org — Exploit, Third Party Advisory
• cve@mitre.org — Product
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Issue Tracking
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Third Party Advisory