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    CVE-2026-44731

    OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, the web application's meetings filter feature leaks whether a given user ID corresponds to a valid account and discloses the user's full name, allowing an attacker to enumerate all existing user accounts by probing user IDs and observing differences in the server response. This vulnerability is fixed in 17.3.2 and 17.4.0.

    Published:Jun 26, 2026
    Last Modified:Jun 29, 2026
    EPS:Jun 26, 2026
    EPSS Score:0.00186
    CVSS Score:4.3

    Affected Products

    Vendor
    Opf
    Product
    Openproject

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-55095 (CVSS 5.3) — OpenProject is open-source, web-based project management software. In version 17.5.1 and earlier, an authentic…
    CVE-2026-67529 (CVSS 4.3) — OpenProject is open-source, web-based project management software. Prior to 17.6.0, GET /api/v3/time_entries a…
    CVE-2026-67528 (CVSS 4.3) — OpenProject is open-source, web-based project management software. Prior to 17.6.0, GET /api/v3/custom_options…
    CVE-2026-67527 (CVSS 7.6) — OpenProject is open-source, web-based project management software. Prior to 17.6.0, PATCH /api/v3/work_package…
    CVE-2026-44733 (CVSS 5.9) — OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, Business Logic …
    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