CVE-2026-22603 OpenProject has no protection against brute-force attacks in the Change Password function
Attackers can bypass brute-force protections on the password change endpoint to guess passwords and compromise user accounts.
- 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-2026-22603?
CVE-2026-22603 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. Prior to version 16.6.2, OpenProject’s unauthenticated password-change endpoint (/account/change_password) was not protected by the same brute-force safeguards that apply to the normal login form. In affected versions, an attacker who can guess or enumerate user IDs can send unlimited password-change requests for a given account without triggering lockout or other rate-limiting controls. This allows automated password-guessing (e.g., with wordlists of common passwords) against valid accounts. Successful guessing results in full account compromise for the targeted user and, depending on that user’s role, can lead to further privilege escalation inside the application. This issue has been patched in version 16.6.2. Those who are unable to upgrade may apply the patch manually.
Weakness: CWE-307
Which versions are affected by CVE-2026-22603?
It affects 1 product.
Products include Openproject Openproject.
How do I fix CVE-2026-22603?
No fix has been published for CVE-2026-22603 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-22603 being exploited?
There is no known exploitation of CVE-2026-22603 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-93x5-prx9-x239.