Paper/Archive/CVE-2025-65548

CVE-2025-65548

mitre — NUT-14 allows cashu tokens to be created with a preimage hash.

CVSS 9.1 (ADP)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 36.0.360 × 207.2 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

n/an/a–CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refdelvingbitcoin.org/t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090 refgithub.com/cashubtc/nuts/blob/main/14.md refgithub.com/cashubtc/nuts/blob/main/07.md refpreimage007.github.io exploitgithub.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 exploitbitcointalk.org/index.php?topic=5564329