Auth bypass in Ilias-Elearning E.v. Ilias
CVE-2026-86416
ILIAS versions before 9.23, 10.11, and 11.4 contain an authorization bypass vulnerability in ilObjGroupGUI where saveMapSettingsObject() and updateGroupTypeObject() perform state-changing operations without write permission checks. Authenticated users with only read access to a group can craft POST requests to modify group map settings and didactic template assignments, changing group modes and permissions for all members.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (37.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% 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: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
- docu.ilias.de/ilias.php (vendor-advisory)
- docu.ilias.de/ilias.php (vendor-advisory)
- docu.ilias.de/ilias.php (vendor-advisory)
- github.com/ILIAS-eLearning/ILIAS/commit/16bca712847f83440fa051cdbb15b38296357c79 (patch)
- github.com/ILIAS-eLearning/ILIAS/blob/v11.3/components/ILIAS/Group/classes/clas… (technical-description)
- github.com/ILIAS-eLearning/ILIAS/blob/v11.3/components/ILIAS/Group/classes/clas… (technical-description)
- github.com/ILIAS-eLearning/ILIAS (product)
- www.vulncheck.com/advisories/ilias-before-9.23-10.11-and-11.4-missing-authoriza… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-86416?
- CVE-2026-86416 is a medium-severity vulnerability in Ilias-Elearning E.v. Ilias, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-09-07.
- How severe is CVE-2026-86416?
- Medium severity. CVSS v3 base score is 5.4 out of 10.