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    CVE-2026-111918

    Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write task_positions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing default_project_id, then create empty-filter saved filters to persist cross-tenant references and amplify writes for denial of service.

    Published:Oct 17, 2026
    Last Modified:Oct 20, 2026
    EPS:Oct 17, 2026
    EPSS Score:0.00176
    CVSS Score:5.4

    Affected Products

    Vendor
    Go-vikunja
    Product
    Vikunja
    Vendor
    Vikunja
    Product
    Vikunja

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-111922 (CVSS 7.2) — Vikunja from 2.2.0 before 2.7.0 contains a permissive CORS configuration that trusts every localhost and 127.0…
    CVE-2026-111921 (CVSS 5.3) — Vikunja 0.13.0 before 2.7.0 contains an incorrect authorization vulnerability that allows project members with…
    CVE-2026-111920 (CVSS 5.3) — Vikunja 2.6.0 contains a broken access control flaw in getProjectAccessForUser (pkg/models/project_access.go),…
    CVE-2026-62376 (CVSS 8.1) — Vikunja is an open-source self-hosted task management platform. Versions prior to 2.4.0 store password-reset, …
    CVE-2026-62367 (CVSS 7.5) — Vikunja is an open-source self-hosted task management platform. In versions 1.0.0 through 2.3.0, when an admin…
    CVE-2026-57458 (CVSS 8.1) — Vikunja is an open-source self-hosted task management platform. In version 2.3.0, a scoped API token limited t…
    CVE-2026-91985 (CVSS 8.7) — Vikunja before 2.6.0 fails to properly restrict access to the link-share hash field in single-share read endpo…
    CVE-2026-91982 (CVSS 5.3) — Vikunja before 2.6.0 continues to expose the raw TOTP shared secret after enrollment through the GET /api/v1/u…
    CVE-2026-91980 (CVSS 5.3) — vikunja before 2.6.0 fails to validate team access when attaching teams to projects, allowing authenticated us…
    CVE-2026-91979 (CVSS 7.1) — Vikunja before 2.6.0 fails to limit archive expansion during data import, allowing authenticated users to caus…

    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