CVE-2025-65548
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 0.4%
exploitation probability
0.4%top 65% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products
n/a · n/aReferences
https://bitcointalk.org/index.php?topic=5564329https://delvingbitcoin.org/t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090https://github.com/cashubtc/nuts/blob/main/07.mdhttps://github.com/cashubtc/nuts/blob/main/14.mdhttps://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.mdhttps://preimage007.github.io/