CVE-2026-44732: OpenProject: IDOR on OpenProject through /api/v3/documents/{id} via PATCH parameter "project_id" leads to Unauthorized Modification of Resources
OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, OpenProject exposes a document update endpoint used to modify existing documents. The target document is loaded with visibility checks and then updated. During update, attacker-controlled attributes are applied to the persisted record before authorization is enforced. As a result, a user without :managedocuments in the source project can move and modify foreign project documents by setting projectid in a single PATCH request. This vulnerability is fixed in 17.3.2 and 17.4.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
OpenProjectto a version that resolves this vulnerability.Fixed in 17.3.2 - Upgrade
Upgrade
OpenProjectto a version that resolves this vulnerability.Fixed in 17.4.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-44732?
The severity of CVE-2026-44732 is medium, with a CVSS score of 4.3.
How do I fix CVE-2026-44732?
To fix CVE-2026-44732, upgrade to OpenProject versions 17.3.2 or 17.4.0 or later.
What is an IDOR vulnerability as seen in CVE-2026-44732?
IDOR, or Insecure Direct Object Reference, in CVE-2026-44732 allows attackers to modify resources they should not have access to.
What does the PATCH parameter in CVE-2026-44732 do?
The PATCH parameter in CVE-2026-44732 is used to update document attributes but can be exploited for unauthorized modifications.
What software is affected by CVE-2026-44732?
CVE-2026-44732 affects OpenProject versions prior to 17.3.2 and 17.4.0.