CVE-2026-86416 ILIAS before 9.23, 10.11, and 11.4 Missing Authorization in Group Object Action Methods
Authenticated users with read-only access can modify group settings and permissions due to missing write permission checks in ILIAS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86416?
CVE-2026-86416 is a medium-severity missing authorization vulnerability in ILIAS-eLearning e.V. ILIAS, published on 7 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-86416?
How do I fix CVE-2026-86416?
No fix has been published for CVE-2026-86416 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-86416 being exploited?
There is no known exploitation of CVE-2026-86416 in the wild and no public exploit code.
Sources
Also known as GHSA-4976-qg89-r3vv.