Medium 6.9Published Jan 9, 2026

CVE-2026-22604OpenProject is vulnerable to user enumeration via the change password function

Updated under an hour ago (Oct 26, 2026, 8:23 PM ET)

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It affects opf openproject and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for opf openproject

Exploited in the last 30 days

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: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-200
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jan 12, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

opf openproject opf:openproject (from the name)	from 11.2.1, < 16.6.2	CNA record
openproject openproject openproject:openproject	from 11.2.1 before 16.6.2	NVD

References

References

https://github.com/opf/openproject/security/advisories/GHSA-q7qp-p3vw-j2fh	x-refsource-confirm, patch, vendor-advisory
https://github.com/opf/openproject/pull/3451	x-refsource-misc, issue-tracking
https://github.com/opf/openproject/commit/2cff5e98649e32a197a62659a23dd4b864b7855b	x-refsource-misc, patch
https://github.com/opf/openproject/releases/tag/v16.6.2	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.