CVE-2026-22604 OpenProject is vulnerable to user enumeration via the change password function
Unauthenticated attackers can enumerate registered usernames via the change password endpoint, exposing user account information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-22604?
CVE-2026-22604 is a medium-severity vulnerability in opf openproject, published on 10 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenProject is an open-source, web-based project management software. For OpenProject versions from 11.2.1 to before 16.6.2, when sending a POST request to the /account/change_password endpoint with an arbitrary User ID as the password_change_user_id parameter, the resulting error page would show the username for the requested user. Since this endpoint is intended to be called without being authenticated, this allows to enumerate the user names of all accounts registered in an OpenProject instance. This issue has been patched in version 16.6.2.
Weakness: CWE-200
Which versions are affected by CVE-2026-22604?
It affects 1 product.
Products include Openproject Openproject.
How do I fix CVE-2026-22604?
No fix has been published for CVE-2026-22604 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-22604 being exploited?
There is no known exploitation of CVE-2026-22604 in the wild and no public exploit code.
Other vulnerabilities in opf openproject
- CVE-2026-34717 OpenProject: SQL Injection in Cost Reporting =n Operator via parse_number_string
- CVE-2026-25763 Command Injection on OpenProject repositories leads to Remote Code Execution
- CVE-2026-24685 OpenProject has Argument Injection on Repository module that allows Arbitrary File Write
- CVE-2026-32698 OpenProject has a SQL Injection via Custom Field Name that can be chained to Remote Code Execution
- CVE-2026-32703 OpenProject's repository files are served with the MIME type allowing them to be used to bypass Content Security Policy
Sources
Also known as GHSA-q7qp-p3vw-j2fh.