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    CVE-2026-40263

    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.

    Published:Apr 16, 2026
    Last Modified:Apr 17, 2026
    EPS:Apr 16, 2026
    EPSS Score:0.00029
    CVSS Score:3.7

    Affected Products

    Vendor
    Enchant97
    Product
    Note-mark

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-208 Observable Timing Discrepancy

    Related CVEs

    CVE-2026-50553 (CVSS 8.6) — Note Mark is an open-source note-taking application. Prior to version 0.19.5, Note Mark validates book and not…
    CVE-2026-50554 (CVSS 5.3) — Note Mark is an open-source note-taking application. Prior to version 0.19.5, GET /api/books/{bookID}/notes is…
    CVE-2026-44522 (CVSS 8.6) — Note Mark is an open-source note-taking application. From 0.13.0 to before 0.19.4, the Note Mark application a…
    CVE-2026-44523 (CVSS 10) — Note Mark is an open-source note-taking application. Prior to 0.19.4, no minimum length or entropy is enforced…
    CVE-2026-41572 (CVSS 5.3) — Note Mark is an open-source note-taking application. Prior to version 0.19.3, after a note-mark owner soft-del…
    CVE-2026-41571 (CVSS 9.4) — Note Mark is an open-source note-taking application. In version 0.19.2, IsPasswordMatch in backend/db/models.g…
    CVE-2026-40265 (CVSS 5.9) — Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the asset download endpoint…
    CVE-2026-40262 (CVSS 8.7) — Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the asset delivery handler …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High