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    CVE-2026-91968

    vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the task-filter endpoint that accepts deeply nested filter expressions without recursion depth limits. Authenticated attackers can supply thousands of nested parentheses in the filter query parameter to exhaust memory and terminate the API process.

    Published:Sep 15, 2026
    Last Modified:Sep 15, 2026
    EPS:Sep 15, 2026
    EPSS Score:
    CVSS Score:6.5

    Affected Products

    Vendor
    Go-vikunja
    Product
    Vikunja
    Vendor
    Vikunja
    Product
    Vikunja

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-674 Uncontrolled Recursion

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads

    Related CVEs

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    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, …
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    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…
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    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