What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-04 · updated 2026-10-26
• Weakness: CWE-287

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.

Affected products

• enchant97 note-mark: = 0.19.2

References

• 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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