Medium severity · published Jan 10, 2026
CVE-2026-22604
OpenProject is vulnerable to user enumeration via the change password function
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openproject · opf
>= 11.2.1, < 16.6.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22604
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-22604
Patch
https://github.com/opf/openproject/commit/2cff5e98649e32a197a62659a23dd4b864b7855b
Issue Tracking
https://github.com/opf/openproject/pull/3451
Release Notes
https://github.com/opf/openproject/releases/tag/v16.6.2
Patch
https://github.com/opf/openproject/security/advisories/GHSA-q7qp-p3vw-j2fh
More from openproject
9.9
CVE-2026-46386
OpenProject: Pre-authentication RCE in openproject/openproject Docker image via default `SECRET_KEY_BASE=OVERWRITE_ME` and `cookies_serializer = :marshal`
9.9
CVE-2026-52782
OpenProject: IDOR through /projects/<A>/settings/project_storages/<A_ps_id> via PATCH parameter "storages_project_storage[project_folder_id]" leads to Access to Unauthorized Resources
9.9
CVE-2026-52785
OpenProject: SQL injection in timestamps functionality
9.9
CVE-2026-25763
Command Injection on OpenProject repositories leads to Remote Code Execution
9.6
CVE-2026-52780
OpenProject: Cache store poisoning leads to Remote Code Execution (RCE)