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CVE-2025-65548

30
FAUCET Score

CVE-2025-65548 is a critical vulnerability affecting cashu nutshell versions prior to 0.18.0, where the mint fails to validate the size of a preimage when spending cashu tokens. This allows an unauthenticated attacker to remotely flood the mint's database and disk with arbitrary data, leading to a denial-of-service condition. Despite its critical CVSS score of 9.1, there is currently no public exploit code, active exploitation, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.18.0CPE matchmatch criteria
cpe:2.3:a:cashu:nutshell:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 6th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bitcointalk.org / index.php
ExploitIssue Tracking
delvingbitcoin.org / t/public-disclosure-denial-of-service-using-htlc-in-cashu/2090
Broken Link
github.com / cashubtc/nuts/blob/main/07.md
ExploitThird Party Advisory
github.com / cashubtc/nuts/blob/main/14.md
ExploitThird 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.md
ExploitThird Party Advisory
preimage007.github.io
Product