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    CVE-2026-67528

    OpenProject is open-source, web-based project management software. Prior to 17.6.0, GET /api/v3/custom_options/:id resolved CustomOption records by global numeric id and allowed UserCustomField and GroupCustomField options without checking visible(current_user), so authenticated non-admin users could enumerate sequential custom option ids and read labels belonging to admin_only user or group custom fields. This issue is fixed in 17.6.0.

    Published:Jul 30, 2026
    Last Modified:Jul 31, 2026
    EPS:Jul 30, 2026
    EPSS Score:0.0021
    CVSS Score:4.3

    Affected Products

    Vendor
    Opf
    Product
    Openproject

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-44731 (CVSS 4.3) — OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, the web applica…
    CVE-2026-44732 (CVSS 4.3) — OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, OpenProject exp…
    CVE-2026-44734 (CVSS 6.5) — OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, a Missing Autho…
    CVE-2026-44735 (CVSS 6.5) — OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, the GET /api/v3…
    CVE-2026-44696 (CVSS 5.7) — OpenProject is open-source, web-based project management software. Prior to 17.4.0, OpenProject's rich text (m…
    CVE-2026-49355 (CVSS 4.3) — OpenProject is open-source, web-based project management software. Prior to 17.4.0, `GET /api/v3/meetings/:mee…

    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