CVE-2026-41571: ENCHANT97 Note-Mark

Critical severity, CVSS 9.4. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

Published 2026-05-04. Last modified 2026-06-17.