CVE-2026-22602 LOW

CVE-2026-22602: OpenProject is Vulnerable to User Enumeration via User ID

Vendor Opf
Product openproject
Weakness CWE-200 · Info exposure
Published January 10, 2026
Last update January 13, 2026
View on NVD All CVEs

CVSS base score

3.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

OpenProject is an open-source, web-based project management software. Prior to version 16.6.2, a low‑privileged logged-in user can view the full names of other users. Since user IDs are assigned sequentially and predictably (e.g., 1 to 1000), an attacker can extract a complete list of all users’ full names by iterating through these URLs. The same behavior can also be reproduced via the OpenProject API, allowing automated retrieval of full names through the API as well. This issue has been patched in version 16.6.2. Those who are unable to upgrade may apply the patch manually.

Key dates

02Disclosure timeline

January 10, 2026 CVE published
January 13, 2026 Record updated