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.
History

Fri, 17 Apr 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 17 Apr 2026 08:15:00 +0000

Type Values Removed Values Added
First Time appeared Enchant97
Enchant97 note-mark
Vendors & Products Enchant97
Enchant97 note-mark

Fri, 17 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
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.
Title Note Mark: Username Enumeration via Login Endpoint Timing Side-Channel
Weaknesses CWE-208
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-16T23:53:50.195Z

Updated: 2026-04-17T12:23:42.042Z

Reserved: 2026-04-10T17:31:45.787Z

Link: CVE-2026-40263

cve-icon Vulnrichment

Updated: 2026-04-17T12:23:32.718Z

cve-icon NVD

Status : Deferred

Published: 2026-04-17T01:17:40.137

Modified: 2026-04-17T15:29:25.583

Link: CVE-2026-40263

cve-icon Redhat

No data.