CVE-2026-22602— OpenProject is Vulnerable to User Enumeration via User ID
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I. Basic Information for CVE-2026-22602
Vulnerability Information
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Vulnerability Title
OpenProject is Vulnerable to User Enumeration via User ID
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenProject 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenProject是OpenProject开源的一个基于Web的项目管理软件。 OpenProject 16.6.2之前版本存在信息泄露漏洞，该漏洞源于低权限登录用户可以查看其他用户的全名，攻击者可通过迭代可预测的用户ID来提取所有用户的全名列表。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| opf | openproject | < 16.6.2 | - |
II. Public POCs for CVE-2026-22602
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|---|
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- Release OpenProject 16.6.2 · opf/openproject · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-22602
Same Patch Batch · opf · 2026-01-10 · 6 CVEs total
| CVE-2026-22600 | 9.1 CRITICAL | OpenProject is Vulnerable to Arbitrary File Read via ImageMagick SVG Coder |
| CVE-2026-22605 | 4.3 MEDIUM | OpenProject is Vulnerable to Insecure Direct Object Reference in Meetings |
| CVE-2026-22604 | OpenProject is vulnerable to user enumeration via the change password function | |
| CVE-2026-22601 | OpenProject is Vulnerable to Code Execution in E-Mail function | |
| CVE-2026-22603 | OpenProject has no protection against brute-force attacks in the Change Password function |
IV. Related Vulnerabilities
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OpenProject: SQL Injection in Cost Reporting =n Operator via - CVE-2026-32703
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Same weakness: CWE-200
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