CVE-2026-40263
Low · 3.7CVSS
3.7
EPSS
0.3%
Published
Apr 17, 2026
CISA due date
—
The record
Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the login endpoint performs bcrypt password verification only when the supplied username exists, returning immediately for nonexistent usernames. This timing discrepancy allows unauthenticated attackers to enumerate valid usernames by measuring response times, enabling targeted credential attacks. This issue has been fixed in version 0.19.2.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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