CVE-2026-67527: OpenProject: Improper Access Control through /api/v3/work_packages/<X.id> via PATCH parameter "fileLinks"
OpenProject is open-source, web-based project management software. Prior to 17.6.0, PATCH /api/v3/workpackages/{id} accepted links.fileLinks and allowed authenticated users with editworkpackages but without managefilelinks to resolve Storages::FileLink records by raw id, detach or hard-delete existing FileLinks, and re-parent FileLinks from other projects to an attacker-controlled work package, exposing origin filename, origin id, and MIME type metadata. This issue is fixed in 17.6.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
OpenProjectto a version that resolves this vulnerability.Fixed in 17.6.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-67527?
CVE-2026-67527 has a severity rating of high with a score of 7.6.
How do I fix CVE-2026-67527?
To fix CVE-2026-67527, update OpenProject to version 17.6.0 or later.
What is the impact of CVE-2026-67527?
CVE-2026-67527 allows authenticated users with specific permissions to bypass access controls and manipulate file links.
Which versions of OpenProject are affected by CVE-2026-67527?
CVE-2026-67527 affects OpenProject versions prior to 17.6.0.
What components are involved in CVE-2026-67527?
CVE-2026-67527 involves the API endpoint /api/v3/work_packages/{id}, specifically the PATCH parameter "fileLinks".