CVE-2026-49355: Exposure of Sensitive Information to an Unauthorized Actor

OpenProject is open-source, web-based project management software. Prior to 17.4.0, GET /api/v3/meetings/:meetingid/agendaitems/:agendaitemid discloses private work package data from a linked work package that belongs to a private/inaccessible project. This vulnerability is fixed in 17.4.0...

CVE-2026-52785: Improper Neutralization of Special Elements used in an SQL Command

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, there is a SQL injection in timestamps functionality. OpenProject baseline comparison allows callers to request historic work-package attributes using the timestamps parameter. This vulnerability is fix...

CVE-2026-52779: Authorization Bypass Through User-Controlled Key

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, a cross-project IDOR / authorization context confusion in the Calendar and Team Planner modules allows a user with management permissions in one project to delete public Calendar or Team Planner Queries...

PT-2026-52912

Name of the Vulnerable Software and Affected Versions OpenProject versions prior to 17.3.3 OpenProject versions prior to 17.4.1 Description The HTML sanitizer allows elements to have unrestricted data- attributes through a :data wildcard. An attacker can inject data-controller="poll-for-changes"...

PT-2026-52908

Name of the Vulnerable Software and Affected Versions OpenProject versions prior to 17.4.0 Description An issue exists where the endpoint GET /api/v3/meetings/:meeting id/agenda items/:agenda item id discloses private work package data. This occurs when a linked work package belongs to a project...

CVE-2026-52781: Improper Neutralization of Input During Web Page Generation

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, the HTML sanitizer grants elements unrestricted data- attributes via :data wildcard. An attacker injects data-controller="poll-for-changes" into a work package description, causing Stimulus.js to mount ...

PT-2026-52915

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, there is a CSRF on TARGET through /users/:id via POST parameter "useradmin". This vulnerability is fixed in 17.3.3 and 17.4.1...

PT-2026-52904

Name of the Vulnerable Software and Affected Versions OpenProject versions prior to 17.3.2 OpenProject versions prior to 17.4.0 Description An authorization flaw exists where the 'GET /api/v3/shares' endpoint returns share details for all work packages within a project to any user possessing the...

PT-2026-52902

Name of the Vulnerable Software and Affected Versions OpenProject versions prior to 17.3.2 OpenProject versions prior to 17.4.0 Description A business logic error exists in the password change behavior. This flaw allows an attacker who has achieved an active session takeover to bypass password...

CVE-2026-44696: Improper Neutralization of Input During Web Page Generation

OpenProject is open-source, web-based project management software. Prior to 17.4.0, OpenProject's rich text markdown rendering pipeline uses Sanitize::Config::RELAXED:css for inline style sanitization. This configuration permits essentially all CSS properties in style attributes on permitted HTML...

PT-2026-52913

Name of the Vulnerable Software and Affected Versions OpenProject versions prior to 17.3.3 OpenProject versions prior to 17.4.1 Description An Insecure Direct Object Reference IDOR exists in the project storage settings. A project administrator can gain unauthorized access to the managed Nextclou...

CVE-2026-52784: Cross-Site Request Forgery (CSRF)

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, there is a CSRF on TARGET through /users/:id via POST parameter "useradmin". This vulnerability is fixed in 17.3.3 and 17.4.1...

CVE-2026-52780: Improper Input Validation

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, cache store poisoning leads to Remote Code Execution RCE. This vulnerability is fixed in 17.3.3 and 17.4.1...

PT-2026-52899

Name of the Vulnerable Software and Affected Versions OpenProject versions prior to 17.4.0 Description The rich text rendering pipeline uses an overly permissive configuration for inline style sanitization. This allows authenticated users with write access to formattable text fields, such as work...

PT-2026-52916

Name of the Vulnerable Software and Affected Versions OpenProject versions prior to 17.3.3 OpenProject versions prior to 17.4.1 Description SQL injection exists in the timestamps functionality of the baseline comparison feature. This allows callers to request historic work-package attributes by...

CVE-2026-44733: Unverified Password Change

OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, Business Logic Error on OpenProject through PATCH request to /api/v3/users/me permits to bypass password requirements. A password validation flaw in the change password behavior allows attackers to chan...

CVE-2026-44734: Missing Authorization

OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, a Missing Authorization vulnerability exists in OpenProject's CostReportsController. The rename and update actions allow any authenticated user to modify the name, filters, and grouping of any Public co...

CVE-2026-40896

OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with manageagendas permission in any project can inject agenda items into meetings belonging to any other project on the instance — even projects they have no access to. No knowledge of the target...

CVE-2026-33667

OpenProject is an open-source project management application. In versions prior to 17.3.0, 2FA OTP verification in the confirmotp action of the twofactorauthentication module has no rate limiting, lockout mechanism, or failed-attempt tracking. The existing bruteforceblockafterfailedlogins setting...

CVE-2026-40896

CVE-2026-40896 concerns OpenProject before version 17.3.0, where a user with the low-privilege permission manage_agendas in any project can inject agenda items into meetings across other projects due to an unscoped section lookup vulnerability. The attack does not require knowledge of the target ...