VULNERABILITY INTELLIGENCE
CVE-2026-40263
CVSS score3.7 LOW
EPSS probability0.26%
CISA KEVNot currently listed
Published2026-04-17
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Description
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.
Weakness classification
- security-advisories@github.com: CWE-208