Information disclosure in Openproject
CVE-2026-22602
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Openproject
- Opf Openproject — versions < 16.6.2
Weakness classification (CWE)
References
- github.com/opf/openproject/security/advisories/GHSA-7fvx-9h6h-g82j (Patch, Vendor Advisory)
- github.com/opf/openproject/pull/21281 (Issue Tracking)
- github.com/opf/openproject/commit/fb39a779f521d9b08f1e0c9e8aff2b6d4643ea37 (Patch)
- github.com/opf/openproject/releases/tag/v16.6.2 (Release Notes)
Frequently asked questions
- What is CVE-2026-22602?
- CVE-2026-22602 is a low-severity vulnerability in Openproject, classified under Information Disclosure. CVSS score: 3.5/10. Published 2026-01-10.
- How severe is CVE-2026-22602?
- Low severity. CVSS v3 base score is 3.5 out of 10.