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    CVE-2026-35601

    Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CalDAV output generator builds iCalendar VTODO entries via raw string concatenation without applying RFC 5545 TEXT value escaping. User-controlled task titles containing CRLF characters break the iCalendar property boundary, allowing injection of arbitrary iCalendar properties such as ATTACH, VALARM, or ORGANIZER. This vulnerability is fixed in 2.3.0.

    Published:Apr 10, 2026
    Last Modified:Apr 17, 2026
    EPS:Apr 10, 2026
    EPSS Score:0.00029
    CVSS Score:4.1

    Affected Products

    Vendor
    Go-vikunja
    Product
    Vikunja
    Vendor
    Vikunja
    Product
    Vikunja

    Exploits

    https://github.com/go-vikunja/vikunja/security/advisories/GHSA-2g7h-7rqr-9p4rhttps://github.com/go-vikunja/vikunja/security/advisories/GHSA-2g7h-7rqr-9p4r

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-15 Command Delimiters
    CAPEC-81 Web Server Logs Tampering

    Related CVEs

    CVE-2026-55067 (CVSS 5) — Vikunja is an open-source self-hosted task management platform. Prior to 2.4.0, POST /api/v1/projects/{project…
    CVE-2026-55066 (CVSS 7.1) — Vikunja is an open-source self-hosted task management platform. Prior to 2.4.0, POST /api/v1/projects/{project…
    CVE-2026-55065 (CVSS 8.1) — Vikunja is an open-source self-hosted task management platform. From 0.24.6 until 2.4.0, DELETE /api/v1/projec…
    CVE-2026-55064 (CVSS 4.3) — Vikunja is an open-source self-hosted task management platform. From 2.3.0 until 2.4.0, a user with Write but …
    CVE-2026-54766 (CVSS 5.3) — Vikunja is an open-source self-hosted task management platform. From 0.21.0 until 2.4.0, the project duplicati…
    CVE-2026-68581 (CVSS 8.6) — Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because use…
    CVE-2026-40103 (CVSS 4.3) — Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's scoped API token enf…
    CVE-2026-35602 (CVSS 5.4) — Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the Vikunja file import endpoi…
    CVE-2026-35600 (CVSS 5.4) — Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded direc…
    CVE-2026-35599 (CVSS 6.5) — Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime fu…

    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