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Vulnerability record · CVE-2026-41571 · published 4 May 2026

CVE-2026-41571: Improper authentication vulnerability

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.

9.4 CVSS 3.1 Critical EPSS 0.48% · top 61.3% CWE-287 · Improper authentication Deferred
9.4CVSS 3.1 base score
0.48%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

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.

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

References

LinkTags
https://github.com/enchant97/note-mark/releases/tag/v0.19.3
https://github.com/enchant97/note-mark/security/advisories/GHSA-pxf8-6wqm-r6hh
https://github.com/enchant97/note-mark/security/advisories/GHSA-pxf8-6wqm-r6hh

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Source: NIST National Vulnerability Database (record CVE-2026-41571), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.