CVE-2026-41571 CRITICAL

CVE-2026-41571: Note Mark: OIDC-registered users authenticated by submitting password "null"

Vendor Enchant97
Product note-mark
Weakness CWE-287 · Improper authentication
Published May 4, 2026
Last update May 4, 2026
View on NVD All CVEs

CVSS base score

9.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Note Mark is an open-source note-taking application. In version 0.19.2, IsPasswordMatch in backend/db/models.go falls back to a hard-coded bcrypt("null") placeholder whenever a user has no stored password. OIDC-registered users are created with an empty password, so anyone who submits password: "null" to the internal login endpoint receives a valid session for that user. The bypass is unauthenticated and requires no user interaction. This issue has been patched in version 0.19.3.

Key dates

02Disclosure timeline

May 4, 2026 CVE published
May 4, 2026 Record updated